Gasoline Usage 15 14 13 12 11 10 987654321 Gallons in Tank 25 50 75 100 125 Miles Driven 150 175 200 1 Mr. Chan is taking his family on a road trip. He has a 15-gallon tank and uses 25 gallons per mile. Write an equation to model this situation and determine how many miles he can travel before he will be on empty.