An engineer wants to determine how the weight of a car, x, affects gas mileage, y. The following data represent the weights of various cars and their miles per gallon. Car A B E Weight (pounds), x C D Miles per Gallon, y 2580 3090 3330 3695 4220 26.1 23.1 20.9 20.3 14.6 (a) Find the least-squares regression line treating weight as the explanatory variable and miles per gallon as the response variable. Write the equation for the least-squares regression line. X + (Round the x coefficient to five decimal places as needed. Round the constant to one decimal place as needed.)