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Absolute Value Equation

A V-shaped graph that points upward or downward

Correlation Coefficient

A variable from a graphing calculator which tells you how closely the equation models the data

Line of Best Fit

The trend line that shows the relationship between two sets of data most accurately

Linear Equation

An equation whose graph is a line.

Negative Reciprocal

ex. 2 and -1/2

Parallel Lines

Lines in the same plane that never intersect

Perpendicular Lines

Lines that intersect to form right angles

Point-Slope Form

ex. y-y1 = m(x-x1), where m is the slope and (x1,y1) is the point the line is passing through

Rate of Change

The relationship between two quantities that are changing. Also called slope


ex. Vertical Change = Rise
Horizontal Change = Run

Slope-Intercept Form

ex. y = mx + b
m = Slope b = y-intercept

Standard Form of a Linear Equation

ex. Ax + By = C, where A, B, and C are real numbers, and A and B are not both zero


A shift of a graph horizontally, vertically, or both


The x-coordinate of the point where a line crosses the x-axis


The y-coordinate of the point where a line crosses the y-axis

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