The graph shows the remaining balance y on a car loan after making x monthly payments.
a. Write an equation of the line, and interpret the slope and y-intercept. What is the remaining balance after 36 payments?
b. Interpret the meaning of the x-intercept in this situation.
Balance
c. What happens to the equation you wrote in part (a) when the y-intercept remains the same and the x-intercept is changed to 72?
What changed in the problem?