Need Help On This.

Question

Sam decides to rent a car for one day during a vacation. The rental car company charges a $50 fee for the day as well as $0.40 per mile driven. Sam wants to model a function for the total cost for the day, C(m), based on the number of miles, m, that he drives. Which of the following correctly expresses that function?

A: C(m) = 50.4m

B: C(m) = 50m + 0.4

C: C(m) = 0.4m + 50

D: C(m) = 50 – 0.4m

E: C(m) = 50m

Answer 1

The company charges $50 no matter how many miles you drive, so that is your starting amount. Then, they charge 40 cents (0.4) per mile, so your function is C(m)=50+0.40m.

Hope this helps!