Brandon has a 55-gallon fish tank. He estimates he can drain the tank at an average rate of 11 gallons per minute. In a linear model of this situation, x represents the number of minutes the tank has been draining. Relative to this situation, what does the y-intercept represent?

Question

A: The y-intercept represents the number of minutes it takes to drain the tank.

B: The y-intercept represents the rate at which the tank can be drained.

C: The y-intercept represents the amount of water in the tank after it has been drained.

D: The y-intercept represents the amount of water in the tank before it has been drained

Answer 1

y = 55 - 11 x
or the way I would say it is
depth = 55 - 11 * minutes since start
the y axis intercept is the value of y when x = 0
It is 55.
Now what does that 55 represent?