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The chapter 5 vocabulary of lines

Constant of variation

what the k is in the equation y = kx


Two perpendicular number lines.

Direct Variation

y = kx

Coordinate planes

The plane formed by 2 number lines that intersect at their zero points dividing the plane into 4 quadrants

Parallel lines

Lines in a plane that never intersect


A relation in which X never repeats

Function notation

Replace the Y with f(x)

Perpendicular lines

two lines that meet and form a right angle

Rate of change

A change in a quality over time (slope)

Point-slope form

y-y1 = m(x-x1)


The domain is pair with with an element in the range


The point of intersection of the y and x axis in a coordinate plan (0,0)


rise /run a ratio that measures a lines' steepness

Slope-intercept form


Standard form



An order pair that make an equation true


values in a mathematical sentence that are separated by an addition or subtration sign


The horizontal line on a coordinate plane


The first number in a ordered pair, domain


The X-coordinate at which a graph intercepts the x-axis


The vertical line on a coordinate plane


The second number in a ordered pair, range


The Y-coordinate at which a graph intercepts the y-axis

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