Lucy bought a new car that has a 18 gallon gas tank. If she can drive 270 miles on a full tank of gas, what is the unit rate of miles per gallon he gets?

18 miles per gallon 252 miles per gallon 15 miles per gallon 288 miles per gallon

To find the unit rate of miles per gallon, we divide the total miles driven by the total gallons of gas used.

In this case, Lucy can drive 270 miles on a full tank of gas, and the tank has a capacity of 18 gallons.

So, the unit rate is 270 miles divided by 18 gallons, which equals 15 miles per gallon.

Therefore, the correct answer is 15 miles per gallon.