The equation M(x,y) = 53 +0.5x -0.7y gives the mileage? (in mpg) of a new car as a function of tire pressure x? (in psi) and speed y? (in mph). Find Mx(32,42) ?(include the appropriate? units) and explain what it means.
Questions
Find Mx(x,y) and Mx(32,42)?, then interpret the result.
Mx(x,y) ?=
M (32,42) ?=
When the tire pressure of the car is ___psi and the speed of the car is ___?mph,
A. Increasing the speed by one mph and maintainng a tire pressure of ___ psi will increase mileage by ___ mpg.
B. increasing the tire pressure by one psi and maintaining a speed of ____ mph will increase mileage by ____ mpg.