Hideki is draining a 45-gallon aquarium at a rate of 15 gallons per minute. What is the initial value of the linear function that represents this situation?
15 gallons
30 gallons
45 gallons
60 gallons

Question

Mercury · Answer

thoughts?

recall that the initial value = the value of the dependent variable when the independent variable = 0

so in this case your independent variable is time and your dependent variable is the volume of water in the tank. what's the volume of water when time = 0?