Gas mileage miles gallon cars 18: 1 19: 2 20: 3 21:2 22:1. Gas mileage miles gallon SUV’s 21: 1. 22: 1. 23:2. 23: 2. 25: 3. The dot plots show the gas mileage for randomly selected cars and suv which data values do both distributions have in common

Both distributions have a gas mileage of 21 miles per gallon in common.