Question

Gary learned that the value of his car depreciates by 15% 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

Answer 1

LOL it would be D if you added a parenthesis
f(m) = (1-0.15)m
BUT
luckily they do that out
(1 - 0.15)m = 0.85 m
which is the answer I would choose :)

Answer 2

ok I'm sorry why is this funny

Answer 3

I thought it was funny because they tricked you by leaving the parenthesis out of D

Answer 4

thanks

Answer 5

If a car decreases in value by 15% each year, it means that in a given year it will be 85% of its value, m, the previous year.

Therefore, the value will be:
f(m) = 0.85m