The monthly cost of driving a car depends on the number of miles driven. Julia found that in October it cost her $200 to drive 300 mi and in July it cost her $350 to drive 600 mi. Express the monthly cost C as a function of the distance driven d assuming that a linear relationship gives a suitable model.

Question

Select the correct answer.
a. C = –50d+0.5
b. C = 50d – 0.5
c. C = 0.5d + 50
d. C = 2d + 50
e. C = 0.5d – 50

Answer 1

c. C = 0.5d + 50