Chantal buys new furniture using store credit, which offers five-year, no-interest financing. She sets up a payment plan to pay the debt off as soon as possible. The function 40x + y = 1,400 can be used to model her payment plan, where x is the number of payments Chantal has made, and y is the amount of debt remaining. If a solution to the equation is (21, 560), which of the following statements is true?
A. Chantal pays $21 per month.
B. Chantal pays $560 per month.
C. After 21 payments, $560 remains to be paid.
D. After 21 payments, Chantal will have paid off $560 of the debt.
Answer:C
Chantal buys new furniture using store credit, which offers five-year, no-interest financing. She sets up a payment plan to pay the debt off as soon as possible. The function 40x + y = 1,400 can be used to model her payment plan, where x is the number of payments Chantal has made, and y is the amount of debt remaining. If a solution to the equation is (21, 560), which of the following statements is true?
A. Chantal pays $21 per month. B. Chantal pays $560 per month. C. After 21 payments, $560 remains to be paid. D. After 21 payments, Chantal will have paid off $560 of the debt.
Explanation: C