Question

The graph represents the cost of a taxi ride, y, dependent upon the number of miles driven, x. Write an equation in slope-intercept form. What values are needed to complete the equation?

(0, 3) (1, 5.5) ( 2, 8) (3, 10.5) (4, 13)

Answer 1

Slope = (5.5 − 3)/(1 − 0) = 2.5 and y‑intercept = 3, so the equation is

y = 2.5x + 3

(Interpretation: $3 base fare + $2.50 per mile.)