Ellis is filling a container with water at a constant rate. The graph shows how the volume of water in the container varies with the amount of time since the container began filling. We see that there are 4 liters of water in the container when the container has been filling for 6 minutes. 5 -4 Volume No 40 Time a. Define a formula to determines the volume (in liters) of water in the container, v, in terms of the number of number of minutes, t, since the container began to fill. Preview b. Define a formula to determine the number of minutes the container has been filling, t, in terms of the number of liters that have been added to the tank, v. Preview