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Illustrative Math-Media4Math Alignment

 

 

Illustrative Math Alignment: Grade 8 Unit 2

Dilations, Similarity, and Introducing Slope

Lesson 11: Writing Equations for Lines

Use the following Media4Math resources with this Illustrative Math lesson.

Thumbnail Image Title Body Curriculum Topic
Definition--Direct-Variation.jpg Definition--Direct Variation Direct Variation

 

 

Topic

Linear Functions

Definition

Direct variation describes a linear relationship between two variables where one variable is a constant multiple of the other, expressed as y = kx, where k is the constant of variation.

Description

Direct variation is a fundamental concept in linear functions, illustrating how one variable changes proportionally with another. The constant of variation, 𝑘 k, represents the rate of change.

In real-world scenarios, direct variation can model relationships such as speed and distance, where distance traveled varies directly with time at a constant speed. Understanding this concept is crucial in fields like physics and engineering.

Applications of Linear Functions
Definition--Slope Concepts--Delta x Definition--Slope Concepts--Delta x Delta x

Topic

Slope

Definition

Delta x is the change in the x-coordinate in a linear relationship.

Description

The term Delta x is fundamental to understanding slope as it represents the horizontal change in a line’s position. In real-world applications, Delta x can represent the distance traveled over time in physics and engineering contexts.

Slope
Definition--Slope Concepts--Delta y Definition--Slope Concepts--Delta y Delta y

Topic

Slope

Definition

Delta y is the change in the y-coordinate in a linear relationship.

Description

The term Delta y signifies the vertical change, essential for calculating slope used in graphing and data interpretation. In practical scenarios, Delta y can illustrate changes in temperature over time or the rise in elevation in geography.

Slope
Definition--Slope Concepts--Grade Definition--Slope Concepts--Grade Grade

Topic

Slope

Definition

Grade is a ratio indicating the steepness of a slope.

Description

The term Grade commonly refers to the angle of elevation or slope expressed as a percentage. In engineering, grades are crucial for designing roads and railways, ensuring safety and efficiency.

Slope
Definition--Slope Concepts--Gradient Definition--Slope Concepts--Gradient Gradient

Topic

Slope

Definition

Gradient represents the rate of change of a quantity.

Description

The Gradient measures how steep a line is, calculated by the ratio of the rise to run. This concept is significant in fields like physics and economics where gradients can represent relationships between variables.

Slope
Definition--Slope Concepts--Negative Slope Definition--Slope Concepts--Negative Slope Negative Slope

Topic

Slope

Definition

Negative Slope indicates a decrease in value as x increases.

Description

The Negative Slope signifies that as one variable increases, the other decreases, often used in economics to depict inverse relationships. This term finds relevance in real-world scenarios like demand curves which slope downwards.

Slope
Definition--Slope Concepts--Pitch Definition--Slope Concepts--Pitch Pitch

Topic

Slope

Definition

Pitch refers to the steepness of a slope in a real-world context.

Description

Pitch is commonly applied in construction and design fields to denote the angle of roofs and ramps. This is essential in architecture, especially when dealing with drainage and material use.

Slope
Definition--Slope Concepts--Point-Slope Form Definition--Slope Concepts--Point-Slope Form Point-Slope Form

Topic

Slope

Definition

Point-Slope Form is a way to express linear equations given the slope and a point on the line.

Description

The Point-Slope Form is crucial in algebra for identifying linear relationships given the slope and a point on the line. Understanding this concept aids in graphing lines efficiently and is foundational in higher mathematics.

For a complete collection of terms related to Slope click on this link: Slope Collection.

Point-Slope Form
Definition--Slope Concepts--Positive Slope Definition--Slope Concepts--Positive Slope Positive Slope

Topic

Slope

Definition

Positive Slope indicates an increase in value as x increases.

Description

The Positive Slope indicates that as x grows, y also rises, signifying direct relationships in data analysis. This principle enables predictions in various analytics and trends.

For a complete collection of terms related to Slope click on this link: Slope Collection.

Slope
Definition--Slope Concepts--Slope Definition--Slope Concepts--Slope Slope

Topic

Slope

Definition

Slope measures the steepness of a line.

Description

Slope is a fundamental concept in mathematics, expressing the ratio of vertical rise to horizontal run. This is vital for understanding linear functions, essential in fields such as physics, economics, and data science.

For a complete collection of terms related to Slope click on this link: Slope Collection.

Slope
Definition--Slope Concepts--Slope Formula Definition--Slope Concepts--Slope Formula Slope Formula

Topic

Slope

Definition

The Slope Formula calculates the rate of change.

Description

The Slope Formula is typically represented as 

This formula is a cornerstone in algebra, enabling students to analyze linear equations effectively.

Slope
Definition--Slope Concepts--Slope-Intercept Form Definition--Slope Concepts--Slope-Intercept Form Slope-Intercept Form

Topic

Slope

Definition

The slope-intercept form is an equation of a straight line represented as y = m x + b, where m is the slope and b is the y-intercept.

Description

The slope-intercept form is a fundamental concept in algebra, providing a straightforward way to graph linear equations. It is widely used in various fields, from economics to physics, to model linear relationships and predict outcomes based on given data. Understanding this form is crucial for students as it lays the foundation for more complex mathematical concepts and real-world applications.

Slope-Intercept Form
Definition--Slope Concepts--Slopes of Parallel Lines Definition--Slope Concepts--Slopes of Parallel Lines Slopes of Parallel Lines

Topic

Slope

Definition

Parallel lines are lines in the same plane that never meet; they have equal slopes.

Description

Understanding the slopes of parallel lines is essential in geometry and algebra, as it helps in identifying and proving parallelism in shapes and graphs. This concept is applied in various fields, including architecture and engineering, where maintaining parallelism is crucial for structural integrity and design. In mathematics education, this concept aids in developing logical reasoning and problem-solving skills.

Slope
Definition--Slope Concepts--Slopes of Perpendicular Lines Definition--Slope Concepts--Slopes of Perpendicular Lines Slopes of Perpendicular Lines

Topic

Slope

Definition

Perpendicular lines intersect at a right angle, and their slopes are negative reciprocals of each other.

Description

The concept of perpendicular slopes is vital in geometry, as it helps in determining the orthogonality of lines. This principle is used in various applications, such as designing perpendicular intersections in roadways and creating right-angle joints in construction. In education, it enhances students' understanding of geometric properties and their ability to solve related problems.

Slope
Definition--Slope Concepts--Steepness Definition--Slope Concepts--Steepness Steepness

Topic

Slope

Definition

Steepness is a measure of how steep a line is, typically calculated as the absolute value of the slope.

Description

Steepness is a key concept in understanding the inclination of lines and surfaces. It is commonly used in fields like geology and civil engineering to assess the gradient of terrains and structures. In math education, learning about steepness helps students grasp the concept of slope and its practical implications, enhancing their analytical skills and understanding of real-world phenomena.

Slope
Definition--Slope Concepts--The Rise Over the Run Definition--Slope Concepts--The Rise Over the Run The Rise Over the Run

Topic

Slope

Definition

The rise over the run describes the change in y over the change in x in a linear relationship.

Description

The concept of "rise over run" is foundational in understanding how to calculate the slope of a line. It is used in various disciplines, such as physics and economics, to model relationships and predict trends. In education, mastering this concept is crucial for students as it forms the basis for graphing linear equations and understanding the behavior of lines in a coordinate plane.

Slope
Definition--Slope Concepts--Undefined Slope Definition--Slope Concepts--Undefined Slope Undefined Slope

Topic

Slope

Definition

Undefined slope occurs when a vertical line is present, meaning there is no change in x.

Description

An undefined slope is a critical concept in mathematics, particularly in graphing. It indicates a vertical line where the change in x is zero, making the slope calculation impossible. This concept is important in various fields, such as computer graphics and data analysis, where vertical lines can represent boundaries or limits. Understanding undefined slopes helps students in identifying and interpreting vertical lines in graphs.

Slope
Definition--Slope Concepts--Zero Slope Definition--Slope Concepts--Zero Slope Zero Slope

Topic

Slope

Definition

Zero slope describes a horizontal line where there is no change in y as x changes.

Description

A zero slope is a key concept in algebra and geometry, representing a horizontal line. It is used in various applications, such as designing flat surfaces and analyzing constant relationships in data. In education, understanding zero slopes helps students in graphing and interpreting horizontal lines, enhancing their ability to analyze linear relationships.

For a complete collection of terms related to Slope click on this link: Slope Collection.

Slope
Desmos Activity: Linear Equations in Standard Form Desmos Activity: Linear Equations in Standard Form Desmos Activity: Linear Equations in Standard Form

In this graphing calculator activity, have your students explore how to convert linear equations in standard form to a linear function in slope-intercept form. This Desmos template allows students to explore the effect of changes in the values of A, B, and C in the standard form and m and b in the slope-intercept form. A companion downloadable worksheet uses the graphing calculator template to explore the properties of these linear equations and functions. Note: The download is a PDF worksheet.

—PRESS PREVIEW TO SEE THE ACTIVITY— To see the complete collection of Desmos activities, click on this link.

The following section includes background information on slope. This background also includes video resources and accompanying transcripts.

Standard Form
Desmos activity Desmos Activity: Slope As Rate of Change Desmos Activity: Slope As Rate of Change

Use this activity to explore slope as a rate of change. In this Desmos activity, the slope of the line is the rate (cost per pound) for purchasing fruit. Students manipulate the slider for m to see the impact on the cost.

Slope and Ratios and Rates
Desmos activity Desmos Activity: Slope As Rise Over Run Desmos Activity: Slope As Rise Over Run

This Desmos activity allows students to explore slope as the ratio of the rise over the run. Click Preview to launch the activity. In the activity students click on the points to create a line segment connecting two points. Use the background grid to determine the rise and the run and calculate the slope.

Slope
Desmos activity Desmos Activity: Slope As Rise Over Run 2

Desmos Activity: Slope As Rise Over Run 2

In this activity, students input different values for the coordinates to create a new line. They can then measure the rise and run to calculate the slope.

Slope
Formulas--Slope Formula Formulas--Slope Formula Formulas | Slope Formula

The formula for the Slope Formula. This is part of a collection of math formulas. 

—PRESS PREVIEW TO SEE THE IMAGE— To see the complete collection of formulas, click on this link.

The following section includes background information on slope. This background also includes video resources and accompanying transcripts.

What Is Slope?

Watch this video to learn about the slope formula. (The transcript is also included.)

Slope
Strategy Pack Instructional Resource--Strategy Pack--The Slope of a Line Instructional Resource | Strategy Pack | The Slope of a Line

Learn different strategies for finding the slope of a line. The Strategy Packs provide alternate ways of solving the same problem, giving your students different approaches to the same problem. The goal of the Strategy Packs is to encourage your students to think strategically when solving math problems.

—PRESS PREVIEW TO LAUNCH THE PRESENTATION— To see the complete collection of Instructional Resources, click on this link.

Note: The download is a PPT file.

Slope
INSTRUCTIONAL RESOURCE: Desmos Tutorial: Linear Functions in Point-Slope Form INSTRUCTIONAL RESOURCE: Desmos Tutorial: Linear Functions in Point-Slope Form INSTRUCTIONAL RESOURCE: Desmos Tutorial: Linear Functions in Point-Slope Form

In this Slide Show, use the Desmos graphing calculator to explore the point-slope form. To see the complete collection of Desmos Resources click on this link.

Note: The download is a PPT file. This is part of a collection of Desmos tutorials on a variety of math topics. To see the complete collection of these resources, click on this link.

Library of Instructional Resources

To see the complete library of Instructional Resources , click on this link.

Applications of Linear Functions, Graphs of Linear Functions and Point-Slope Form
INSTRUCTIONAL RESOURCE: Math Examples--Graphing Linear Functions in Slope-Intercept Form INSTRUCTIONAL RESOURCE: Math Examples 19 INSTRUCTIONAL RESOURCE: Math Examples--Graphing Linear Functions in Slope-Intercept Form

The complete set of 13 examples that make up this set of tutorials.

This is part of a collection of math examples for a variety of math topics. To see the complete collection of these resources, click on this link. Note: The download is a PPT file.

Library of Instructional Resources

To see the complete library of Instructional Resources , click on this link.

Applications of Linear Functions and Graphs of Linear Functions
INSTRUCTIONAL RESOURCE: Math Examples--Line From Two Points INSTRUCTIONAL RESOURCE: Math Examples 25 INSTRUCTIONAL RESOURCE: Math Examples--Line From Two Points

The complete set of 29 examples that make up this set of tutorials.

This is part of a collection of math examples for a variety of math topics. To see the complete collection of these resources, click on this link. Note: The download is a PPT file.

Library of Instructional Resources

To see the complete library of Instructional Resources , click on this link.

Applications of Linear Functions and Graphs of Linear Functions
INSTRUCTIONAL RESOURCE: Math Examples--Linear Equations in Standard Form INSTRUCTIONAL RESOURCE: Math Examples 26 INSTRUCTIONAL RESOURCE: Math Examples--Linear Equations in Standard Form

This PowerPoint includes the 22 Tutorials on the topic of converting Linear Equations in Standard Form to Slope-Intercept Form.

This is part of a collection of math examples for a variety of math topics. To see the complete collection of these resources, click on this link. Note: The download is a PPT file.

Library of Instructional Resources

To see the complete library of Instructional Resources , click on this link.

Applications of Linear Functions and Graphs of Linear Functions
INSTRUCTIONAL RESOURCE: Math Examples--Midpoint Formula INSTRUCTIONAL RESOURCE: Math Examples 30 INSTRUCTIONAL RESOURCE: Math Examples--Midpoint Formula

The complete set of 20 examples that make up this set of tutorials.

This is part of a collection of math examples for a variety of math topics. To see the complete collection of these resources, click on this link. Note: The download is a PPT file.

Library of Instructional Resources

To see the complete library of Instructional Resources , click on this link.

Midpoint Formula
INSTRUCTIONAL RESOURCE: Math Examples--Point-Slope Form INSTRUCTIONAL RESOURCE: Math Examples 36 INSTRUCTIONAL RESOURCE: Math Examples--Point-Slope Form

The complete set of 8 examples that make up this set of tutorials.

This is part of a collection of math examples for a variety of math topics. To see the complete collection of these resources, click on this link. Note: The download is a PPT file.

Library of Instructional Resources

To see the complete library of Instructional Resources , click on this link.

Applications of Linear Functions and Graphs of Linear Functions
INSTRUCTIONAL RESOURCE: Nspire App Tutorial: Point-Slope Form INSTRUCTIONAL RESOURCE: Nspire App Tutorial: Point-Slope Form

In this Slide Show, create a template for determining the equation of a line given a point and the slope of the line. This presentation requires the use of the TI-Nspire iPad App. Note: the download is a PPT.

Applications of Linear Functions, Graphs of Linear Functions and Point-Slope Form
INSTRUCTIONAL RESOURCE: Tutorial: The Point-Slope Form INSTRUCTIONAL RESOURCE: Tutorial: The Point-Slope Form

<h1>INSTRUCTIONAL RESOURCE: Tutorial: The Point-Slope Form</h1><p>In this Slide Show, learn about thepoint-slope form. </p><h3> This is part of a collection of tutorials on a variety of math topics. To see the complete collection of these resources, <a href="https://www.media4math.com/instructional-resources?field_la_display_tit… on this link.</u></strong></a> </h3>

<h3> Note: The download is a PPT file. </h3><

<h2> Library of Instructional Resources </h3>

Applications of Linear Functions, Graphs of Linear Functions and Point-Slope Form
INSTRUCTIONAL RESOURCE: Tutorial: Equations of Parallel and Perpendiclar Lines (SAT Prep) INSTRUCTIONAL RESOURCE: Tutorial: Equations of Parallel and Perpendiclar Lines (SAT Prep) INSTRUCTIONAL RESOURCE: Tutorial: Equations of Parallel and Perpendiclar Lines (SAT Prep)

This slide show shows how to write equations in slope-intercept form for parallel and perpendicular lines. This slide show also includes some sample SAT-style questions.

This is part of a collection of tutorials on a variety of math topics. To see the complete collection of these resources, click on this link. Note: The download is a PPT file.

Library of Instructional Resources

To see the complete library of Instructional Resources , click on this link.

Slope-Intercept Form
INSTRUCTIONAL RESOURCE: Tutorial: Point-Slope Form (SAT Prep) INSTRUCTIONAL RESOURCE: Tutorial: Point-Slope Form (SAT Prep)

INSTRUCTIONAL RESOURCE: Tutorial: Point-Slope Form (SAT Prep)

This slide show shows how to use the point-slope form to write a linear equation in slope-intercept form. This slide show also includes some sample SAT-style questions.

This is part of a collection of tutorials on a variety of math topics. To see the complete collection of these resources, click on this link. Note: The download is a PPT file.

Library of Instructional Resources

To see the complete library of Instructional Resources , click on this link.

Point-Slope Form
Interactive Crossword Puzzle--Slope Intercept Form Interactive Crossword Puzzle--Slope Intercept Form Interactive Crossword Puzzle--Slope Intercept Form

This interactive crossword puzzle tests knowledge of key terms on the topic of the slope intercept form.

This is part of a collection of math games and interactives. To see the complete collection of the games, click on this link. Note: The download is the teacher's guide.

Related Resources

To see additional resources on this topic, click on the Related Resources tab.
Slope-Intercept Form
Math Example--Geometric Transformation--Transformations: Example 1 Math Example--Geometric Transformation--Transformations: Example 1 Math Example--Geometric Transformation--Transformations: Example 1

This is part of a collection of math examples that focus on geometric transformations.

Definition of Transformations
Math Example--Geometric Transformation--Transformations: Example 10 Math Example--Geometric Transformation--Transformations: Example 10 Math Example--Geometric Transformation--Transformations: Example 10

This is part of a collection of math examples that focus on geometric transformations.

Definition of Transformations
Math Example--Geometric Transformation--Transformations: Example 11 Math Example--Geometric Transformation--Transformations: Example 11 Math Example--Geometric Transformation--Transformations: Example 11

This is part of a collection of math examples that focus on geometric transformations.

Definition of Transformations
Math Example--Geometric Transformation--Transformations: Example 12 Math Example--Geometric Transformation--Transformations: Example 12 Math Example--Geometric Transformation--Transformations: Example 12

This is part of a collection of math examples that focus on geometric transformations.

Definition of Transformations
Math Example--Geometric Transformation--Transformations: Example 13 Math Example--Geometric Transformation--Transformations: Example 13 Math Example--Geometric Transformation--Transformations: Example 13

This is part of a collection of math examples that focus on geometric transformations.

Definition of Transformations
Math Example--Geometric Transformation--Transformations: Example 14 Math Example--Geometric Transformation--Transformations: Example 14 Math Example--Geometric Transformation--Transformations: Example 14

This is part of a collection of math examples that focus on geometric transformations.

Definition of Transformations
Math Example--Geometric Transformation--Transformations: Example 15 Math Example--Geometric Transformation--Transformations: Example 15 Math Example--Geometric Transformation--Transformations: Example 15

This is part of a collection of math examples that focus on geometric transformations.

Definition of Transformations
Math Example--Geometric Transformation--Transformations: Example 16 Math Example--Geometric Transformation--Transformations: Example 16 Math Example--Geometric Transformation--Transformations: Example 16

This is part of a collection of math examples that focus on geometric transformations.

Definition of Transformations
Math Example--Geometric Transformation--Transformations: Example 17 Math Example--Geometric Transformation--Transformations: Example 17 Math Example--Geometric Transformation--Transformations: Example 17

This is part of a collection of math examples that focus on geometric transformations.

Definition of Transformations
Math Example--Geometric Transformation--Transformations: Example 18 Math Example--Geometric Transformation--Transformations: Example 18 Math Example--Geometric Transformation--Transformations: Example 18

This is part of a collection of math examples that focus on geometric transformations.

Definition of Transformations
Math Example--Geometric Transformation--Transformations: Example 19 Math Example--Geometric Transformation--Transformations: Example 19 Math Example--Geometric Transformation--Transformations: Example 19

This is part of a collection of math examples that focus on geometric transformations.

Definition of Transformations
Math Example--Geometric Transformation--Transformations: Example 2 Math Example--Geometric Transformation--Transformations: Example 2 Math Example--Geometric Transformation--Transformations: Example 2

This is part of a collection of math examples that focus on geometric transformations.

Definition of Transformations
Math Example--Geometric Transformation--Transformations: Example 20 Math Example--Geometric Transformation--Transformations: Example 20 Math Example--Geometric Transformation--Transformations: Example 20

This is part of a collection of math examples that focus on geometric transformations.

Definition of Transformations
Math Example--Geometric Transformation--Transformations: Example 21 Math Example--Geometric Transformation--Transformations: Example 21 Math Example--Geometric Transformation--Transformations: Example 21

This is part of a collection of math examples that focus on geometric transformations.

Definition of Transformations
Math Example--Geometric Transformation--Transformations: Example 22 Math Example--Geometric Transformation--Transformations: Example 22 Math Example--Geometric Transformation--Transformations: Example 22

This is part of a collection of math examples that focus on geometric transformations.

Definition of Transformations