Amanda bought a truck for $20,000. The value of the truck depreciates by 7 percent each year. Which of the following functions models this scenario, where x is the number of years Which is correct:

A) ƒ(x) = x2 – 7x + 20,000
B) ƒ(x) = 20,000 – 7x
C) ƒ(x) = 20,000(1.07)x
D) ƒ(x) = 20,000(0.93)x