Atub of water is emptied at a rate of 3 gallons per minute. the equation y-12=36-1) models the amount of water
remaining, where x is time (in minutes) and y is the amount of water left in gallons) analyze the work shown below
to determine the initial amount of water.
1 solve for the variable
y - 12 = 3x - 1)
3-12-3x+3
yux+15
2 write the equation using function notation.
fo) = -3r15
the tub started with
gallons of water