Slope-Intercept Form

Question

I need help solving this problem:

Pierson's Pet Palace has an 85 gallon fish tank. When it needs to be cleaned it can be drained at a rate of 4 gallons per minute. Assuming the tank was full, write a function that represents the amount of water in the tank after x minutes.

How long has the tank been draining if there is 30 gallons left?

Answer 1

Pierson's Pet Palace has an 85-gallon fish tank. When it needs to be cleaned it can be drained at a rate of 4 gallons per minute. Assuming the tank was full, write a function that represents the amount of water in the tank after x minutes.

How long has the tank been draining if there are 30 gallons left?

We know that the fish tank holds 85 gallons of water. We know that the water drains at 4 gallons a minute. We are looking for how many minutes the gallon has drained.

So your equation would be:

85-4x=30

Answer 2

30 = 85 - 4m, m rerprents the number of minutes