The cost, in dollars, of parking a car in a busy downtown area for h hours is $10 + $3h.
Which statement is correct?
A.
For every hour the car is parked, the cost increases by $10.
B.
For every hour the car is parked, the cost increases by $7.
C.
For every hour the car is parked, the cost increases by $13.
D.
For every hour the car is parked, the cost increases by $3.
