Is the number of gallons of water in the bathtub a function of time? Yes because each t value is paired with exactly one number of gallons. Yes because the number of gallons is bounded between y = 0 and y = 36. No because each number of gallons is paired with more than one t value. No because from t = 5 to t = 20 the number of gallons of water is constant. Mark this and return Save and Exit