17. You are the general manager of a car rental service at the airport. In an effort to estimate the maintenance costs you obtain the following data from a sample of 1 1 cars. In this data x = number of miles on the car (in thousands) and y = total maintenance cost in dollars. X 3 5 12 8 3 y 90 150 320 208 98 a. Find the equation of the least squares line. b. Use the least squares line to predict the total maintenance cost of a care with 7,000 miles on it. Final exam date and time: Don't be late. During the final exam, pace yourself, there would not be any additional time given. Thx