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Absolute Value Equation

A V-shaped graph that points upward or downward

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Correlation Coefficient

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

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Line of Best Fit

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

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Linear Equation

An equation whose graph is a line.

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Negative Reciprocal

ex. 2 and -1/2

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Parallel Lines

Lines in the same plane that never intersect

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Perpendicular Lines

Lines that intersect to form right angles

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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

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Rate of Change

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

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Slope

ex. Vertical Change = Rise

Horizontal Change = Run

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Slope-Intercept Form

ex. y = mx + b

m = Slope b = y-intercept

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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

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Translation

A shift of a graph horizontally, vertically, or both

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X-Intercept

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

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Y-Intercept

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

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