Question

Question 4 of 5

A tank full of water is leaking at a constant rate for 30 minutes. The equation
y=-7x + 300
gives the amount of water in the tank, where y is the number of liters and xis
the number of minutes since the tank began to leak. Which statement is true?
A. There were 300 liters in the tank after 20 minutes, and it is
decreasing by 7 liters per minute.
O B. There were 300 liters in the tank when the leak started, and it is
decreasing by 7 liters per minute.
C. There were 7 liters in the tank when the leak started, and it is
decreasing by 300 liters per minute.
O D. There were 7 liters in the tank when the leak started and it is
increasing by 300 liters per minute.

Answer 1

It’s B, -7x is the rate of the water decreasing while 300 is the starting point.