10 terms

slope = 2 & y-intercept = 3

y = 2x + 3

slope = -5 & y-intercept = 9

y = -5x + 9

slope = 1 & y-intercept = -4

y = x - 4

slope = -6 & y-intercept = -8

y = -6x - 8

parallel lines

Two lines in the same plane that never intersect.

linear regression

a method that graphing calculators use to find a precise line of fit that models a set of data.

causation

when a change in one variable causes a change in another variable.

y = 3x - 2

y = -2x + 3

y = 2x - 4