Question

Brian is driving on a highway. He uses 1 gallon of gas every 50 miles he drives. The distance,D (in miles), he travels on g gallons of gas is given by the following function.D(g)=50gHow far does Brain drive if he uses 3 gallons of gas?

Answer 1

D(g) = 50g

If Brian uses 3 gallons of gas, he will drive D(3) = 50*3 = 150 miles