A 75-gallon tank that is full of water needs to be drained and it drains at a constant rate of 9 gallons per minute.

Write an linear function representing the number of gallons of water left in the tank after x minutes.

Question

A 75-gallon tank that is full of water needs to be drained and it drains at a constant rate of 9 gallons per minute. 

Write an linear function representing the number of gallons of water left in the tank after x minutes.

anonymous · Answer

y=75-9x

anonymous · Answer

thank you (: buuut howd u get the answer?

anonymous · Answer

If you think of it on a graph you start at the point 75 because thats how many gallons you start with. than it empties at a rat of 9 gallons per min. So subtract 9 and x stands for the minutes