A car company uses the table below to show customers the approximate amount of gas used when a car has been driven a certain number of miles.
 Gas Use
 M G
 120 6
 300 15
 360 18
 480 ?
 If the car always uses the same amount of gasoline each mile, how many gallons of gasoline would be needed to travel 480 miles?
 20
 24
 33
 39