3. The following data give car weight and mileage. x, Weight (pounds) y, Mileage (mpg) 2250 53.3 2750 46.9 3000 31.5 3500 31.3 3500 28.0 4000 23.1 5500 13.2 a. Find the regression line, = _________________________________. b. Use the regression equation to approximate the mileage of a car with a weight of 3300 lbs. Round your answer to one decimal place. c. Use the regression equation to approximate the weight of a car whose mileage is 60 mpg. Round your answer to one decimal place. d. Does the value of r suggest that the regression line is appropriate for making estimates of weights versus mileage?