The equation M(x,y) = 52 + 0.4x - 0.3y gives the mileage (in mpg) of a new car as a function of tire pressure x (in psi) and speed y (in mph). Find My(28,45) (include the appropriate units) and explain what it means. My (28,45) = Explain what the answer in the previous step means when the tire pressure of the car is 28 psi and the speed of the car is 45 mph. Select the correct choice below and fill in the answer box(es) within your choice. O A. Mileage is mpg at a tire pressure of psi and a speed of mph. O B. Increasing the speed by one mph and maintaining a tire pressure of psi will increase mileage by mpg. O C. Increasing the speed by one mph and maintaining a tire pressure of psi will increase mileage by mpg. O D. Increasing the tire pressure by one psi and maintaining a speed of mph will increase mileage by mpg. O E. Increasing the tire pressure by one psi and maintaining a speed of psi will decrease mileage by mpg