Ariel is emptying the water from a 10 gallon cooler. The graph shows the water level in the cooler as she empties it. Which best describes the rate of change shown in the graph.
The water level decreases 2 gallons every 3 seconds.
The water level decreases 3 gallons every 2 seconds.
The water level decreases 10 gallons per second.
The water level decreases 1 gallon every 2 seconds.