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Algebra I Chapter 6 Vocab

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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
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
Translation
A shift of a graph horizontally, vertically, or both
X-Intercept
The x-coordinate of the point where a line crosses the x-axis
Y-Intercept
The y-coordinate of the point where a line crosses the y-axis