The point (a,b) is (5,7) . Therefore, the equation of the line is y=7
12x8=96
This should be the correct answer
Vertical stretch by a factor of 3 and a reflection over x-axis is g(x)= -3|x|
So we know the tank already has 5 gallons and we need 9. This means we need 4 more gallons in order to fill up the tank.
If 1/4 gallon is being filled per minute we need to find out how many 1/4 gallons makes up 4 gallons in total.
4 of the 1/4 gallons makes up 1 whole gallon. So since we need 4 whole gallons we would need 16 of the 1/4 gallons.
This means that it will take 16 minutes for the tank to hold 9 gallons of water.