=+33. Let y 5 sales at a fast-food outlet (1000s of $), x1 5 number of competing outlets within a 1-mile radius, x2 5 population within a 1-mile radius (1000s of people), and x3 be an indicator variable that equals 1 if the outlet has a drive-up window and 0 otherwise. Suppose that the true regression model is y 5 10.00 2 1.2x1 1 6.8x2 1 15.3x3 1 e