Answer:
The domain is the time, in minutes from 0 to however long it takes to drain the cooler.
The range is from 12 quarts water to empty.
Explanation:
I don't see a graph, but will use the given information to identify a domain and range for the information provided.
The domain is the range of values that are possible for the x axis. In this case, the x axis it time, in minutes. If we set x as the time, in minutes, that the water has been draining, time = 0, is the start of the process.
The y axis, the range, starts at 12 quarts at time = 0. It then decreases with time until the cooler is empty. The range of the function is thus 12 quarts to 0 quarts: Full to empty.
If we knew the actual rate that the cooler drains (e.g., quarts/minute), we could estabish an upper limit to the domain. If a graph were shown of the data, this rate could be calculated and an upper end to the domain could be set. If the rate were 2 quarts/minute, the upper end of the domain would be (12 quarts/2 quarts/minute) = 6 minutes. The domain would be 0 - 6 minutes.