After pulling the plug from a tub, the amount of water in the tub changed at a constant rate of -1.7 gallons per minute. After draining for 5.5 minutes, there were 38 gallons of water remaining in the tub.
a. Find the change in the number of gallons in the tub when the draining time changes from 2 minutes to 6 minutes.
b. How many gallons of water were in the tub before the tub began to drain?
c.Write an equation that computes the number of gallons in the tub, y, in terms of the number of minutes elapsed since the plug was pulled, x.