Cheryl borrowed $7,000 from her parents to purchase a car interest free. she makes one payment on the loan to her parents each month. if the loan amount decreases by $300 each month, which of the following functions represents the loan amount, L(x), after x months?
A. L(x) = $6,700x
b. L(x) = $300x
C. L(x) = $300 - $7,000x
D. L(x) = $7,000 - $300x