Gary learned that the value of his car depreciates by 15% percent per year. Which of the following functions best describes the value of his car the year after the car is worth m dollars?

A. f (m) = 0.15m

B. f (m) = 0.85m

C. f (m) = 1-0.15m

D. f (m) = 1-0.85m

For this case we have that the original value of the car is:

m dollars

For the following year we have the value is:

((100-15) / (100)) m

Rewriting we have:

((85) / (100)) m

0.85m

Answer:

the value of his car the year after the car is worth m dollars is:

B. f (m) = 0.85m