The x intercept is 3 and the y intercept is -1.
The graph would look something like the image below.
Hope this helped you!
60 minutes per hour
5*60 = 300 quarts per hour
4 quarts per 1 gallon
300/4 = 75 gallons per hour
Yes they can and it depends on what the standard deviations are. The standard deviation is a measure of how close results are to the mean, a low standard deviations means the measurements are precise, so close to the mean. A high standard deviation means that measurements are more spread out. Saying that one set is more spread out than the other.
Yes it can hold up to a little over 4 liters