SAT® Math

Free Version

Upgrade subject to access all content


Filling Backyard Pools


The Daniels, Jean, Raes, and Hudson families are all filling their backyard pools of various sizes at the start of the summer. Each of the pools was already partially full before the families started to raise the water to the desired level for the summer. The graph above shows the number of gallons in each pool over a period of hours after the filling process began for each pool. Which of the four families filled their pools at the same rate of gallons per hour? (Calculator)


The Daniels and the Jean familes.


The Daniels and the Raes families.


The Hudson and the Jean familes.


Each family filled their pool at a different rate.