The total cost of renting a car is determined by the number of days a car is rented, at $75 per day, and the number of
miles it is driven, at $0.50 per mile. The company uses the expression 75x +0.50y to evaluate the total cost of renting a
car. What does the variable x represent?
A the total number of days rented
B the total number of miles driven
the total amount charged per rental day
D the total amount charged per mile driven