Final answer:
To find the rate at which Ian's car uses gas, divide the distance traveled by the amount of gas used. In this case, the car traveled 64 miles and used 2 gallons of gas, so the rate is 32 miles per gallon.
Step-by-step explanation:
To find the rate at which Ian's car uses gas, we divide the distance traveled by the amount of gas used. In this case, the car traveled 64 miles and used 2 gallons of gas, so we divide 64 by 2 to get the rate.
64 miles ÷ 2 gallons = 32 miles per gallon
Therefore, the car uses gas at a rate of 32 miles per gallon.