A study was conducted to investigate the relationship between the resale price, y (in hundreds of dollars),

Question:

A study was conducted to investigate the relationship between the resale price, y (in hundreds of dollars), and the age, x (in years), of midsize luxury American automobiles. The equation of the line of best fit was determined to be yˆ =185.7 -21.52x
a. Find the resale value of such a car when it is 3 years old.
b. Find the resale value of such a car when it is 6 years old.
c. What is the average annual decrease in the resale price of these cars?