A car can travel 32 miles for each gallon of gasoline. The function d (x) equals=32x represents the distance d (x), in miles, that the car can travel with x gallons of gasoline. The car's fuel tank holds 10 gal.

The car fuel tank represents the variable x value while the d (x) represents distance it can travel. If the car has 10 gallons of fuel inside its tank, to find the distance that the car can travel would be:

d (x) = 32x

d (10) = 32 (10)

d (10) = 320 miles