Given:
The rate of the small hose = 15 gallons per minute
The rate of the large hose is twice the rate of the small hose.
So, the rate of the large hose = 30 gallons per minute
We need to show the relationship between time and the gallons of water pumped by the large hose.
Let the time = t
And the number of gallons = g(t)
So, the relation between the time and the number of gallons will be:
The following graph represents the relation between them: