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the x-coordinate of the point where a graph intersects the x-axis

linear function

a function whose graph forms a straight line

linear equation

an equation that can be written in the form Ax+By=C, where A, B, and C are all real numbers, and A and B are not both zero


a measure of steepness of a line


the y-coordinate of the point where a graph intersects the y-axis

constant of variation

the constant k in a direct variation equation

direct variation

a relationship between two variables, x and y, that can be written in the form y=kx, where k is a non zero constant

perpendicular lines

lines that intersect at 90 degree angles

parallel lines

lines in the same plane that do no intersect


a turn


a flip

family of functions

a set of functions whose graphs have basic characteristics in common

parent function

the most basic function of a family of functions, or the original function before a transformation is applied


a slide

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