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 below. = 174.2 ? 21.17x (a) Find the resale value in dollars of such a car when it is 3 years old. $ 1 (b) Find the resale value in dollars of such a car when it is 6 years old. $ 2 (c) What is the average annual decrease in the resale price in dollars of these cars? $ 3