Determine the initial value and the rate of change in the following description. A 2,000-gallon tank is half full with 1,000 gallons of water. Water is being pumped into the tank at a rate of 15 gallons per minute.

The initial value is B=?
And the rate of change is M=?

The initial value is B= 1,000 gallons (the amount of water initially in the tank).

The rate of change is M= 15 gallons per minute (the rate at which water is being added to the tank).