A car uses 9 gallons of gasoline on a trip of 315 miles. At that rate, how much gasoline will a trip of 595 miles require? Please show work.
To drive 315 miles, the amount of gasoline the car needs = 9 gallons
To drive 1 mile, the amount of gasoline the car needs = 9 gallons/ 315 mile
(Alternatively, you can think like: If to drive 315miles, a car needs 9 ...
This is a word problem regarding mileage.