Math Example--Linear Function Concepts--The Equation of a Line Given Two Points: Example 9

Topic

Linear Functions

Description

The image shows a coordinate plane with two points (-5, -4) and (-4, -1) marked. It provides a step-by-step solution to find the equation of the line passing through these points. The slope is calculated, and the equation is derived using point-slope form. The slope is calculated as (y₂ - y₁) / (x₂ - x₁) = (-1 - (-4)) / (-4 - (-5)) = 3 / 1 = 3. Using point-slope form, y - y₁ = m(x - x₁), the equation is derived as y + 1 = 3(x + 4), which simplifies to y = 3x + 11.

Linear functions are fundamental in algebra and have numerous real-world applications. This collection of examples helps teach the concept by providing various scenarios, including positive and negative slopes, fractional slopes, and special cases. By presenting different cases, students can develop a comprehensive understanding of how to determine the equation of a line given two points.

Exposure to multiple worked-out examples is crucial for students to fully grasp this concept. Each example reinforces the steps involved in finding the equation of a line, while also highlighting unique situations that may arise. This repetition helps students recognize patterns, build confidence in their problem-solving abilities, and develop a deeper understanding of linear functions and their properties.

Teacher's Script: Let's move on to our ninth example. We have two points: (-5, -4) and (-4, -1). Notice that we're dealing with negative coordinates for both x and y. Don't let that intimidate you! We'll use the same process we've been using, but pay close attention to how we handle these negative values when calculating the slope and deriving the equation.

For a complete collection of math examples related to Linear Functions click on this link: Math Examples: Linear Functions Collection.