A car rental agency charges $50 per week plus $0.50 per mile to rent a car.
a. Express the weekly cost to rent the car, f, as a function of the number of miles driven during the week, x.
b. How many miles did you drive during the week if the weekly cost to rent the car was $100?
The cost in dollars is given as 50 + 0.50x, so ... f(x) = 0.50x +50
B) You want to find x for f(x) = 100. Substitute the given numbers and solve for x. 100 = 0.50x +50 50 = 0.50x 50/0.50 = x 100 = x You drove 100 miles during the week if the cost was $100.
