Definitions: Linear Graphs and Parallel and Perpendicular Lines

Instructions:

Review definitions related to equations of parallel and perpendicular lines.

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Linear Function. A function of the form y = mx + b, where m is the slope of the line and b is the y-intercept.

y-intercept. The point on the y-axis where a linear function intersects. In slope-intercept form, the y-intercept is designated as b.

Slope Formula. The equation used to find the slope m of a line, given two coordinates on the line.

Equations of Parallel Lines. Two linear functions that have parallel graphs have the same slope but different y-intercepts.

Equations of Perpendicular Lines. Two linear functions that have perpendicular graphs have slopes that are negative reciprocals.

The Rise Over the Run. Another way of referring to slope: The ratio of the change in vertical distance over the change in horizontal distance.