How do I find the total distance traveled?

Question

   <!--[endif]-->Most cars can travel around 20 miles per gallon of gas that is in their tank. Write a rule that relates the total distance a car can travel d as a function of the number of gallons of gas in its tank g.

Answer 1

d=20g because the rate of consumption is 20mi/g. For example, with 1 gallon you can travel 20 miles. With 2 gallons you can travel 40 miles. (Each gallon gives you another 20 miles.)