The equation M(x,y) = 73 + 0.3x - 0.5y gives the mileage (in mpg) of a new car as a function of tire pressure x (in psi) and speed y (in mph). Find M(34,55) (include the appropriate units) and explain what it means. M(34,55) = (Type an integer or a decimal.) Explain what the answer in the previous step means. Select the correct choice below and fill in the answer boxes within your choice. (Type integers or decimals.) O A. Mileage is mpg at a tire pressure of psi and a speed of mph. O B. Increasing the tire pressure by one psi and maintaining a speed of mph 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 psi will decrease mileage by mpg. O E. Increasing the speed by one mph and maintaining a tire pressure of psi will increase mileage by mpg