The cost in dollars C(x), where x is the number of miles driven, of renting a car for a day is C(x)= 1.85x+30

Question

The cost in dollars C(x), where x is the number of miles driven, of renting a car for a day is

 C(x)= 1.85x+30

What is the independent variable and its units?

What is the dependent variable and its units? 

Answer 1

x is the independent variable measured in miles

C(x) is the dependent variable measured in dollars