Harry’s Rent-a-Heap will rent you a rusted 1968 Ford van for $15 per day plus

$ .20 per mile.

- How much will you pay if you rent the van for 3 days and drive it 245 miles?
- How much will you pay if you rent it for
*d*days and drive it*m*miles? (The answer is a formula.)

(a) 3 x 15 + .20 x 245 = 45 + 49 = 94. The cost is $94.00.

(b) *C* = 15*d* + .20*m*.