(a)Charmaine pumped 60 gallons of water out of her pool. This was done over a period of 10 minutes at a constant rate. What was the change in the amount of water in the pool each minute?

We have the next information
60 gallons - 10 minutes
x gallons - 1 minute
x is the number of gallons per minutes, in order to find that we need to divide 60 between 10
[tex]x=\frac{60}{10}=6[/tex]6 gallons per minute