Question

The number of gallons of water, y , in a tank after x hours may be modeled by the linear equation y = 800 - 50x . Which of the following statements about the tank is true?
It is filling at a rate of 50 gallons per hour.
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It is emptying at a rate of 800 gallons per hour.
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It is emptying at a rate of 16 gallons per hour.
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It is filling at a rate of 800 gallons per hour.
It is emptying at a rate of 50 gallons per hour

Answer 1

it is emptying at a rate of 50 gallons per hour because, the gradient is negative.

don't you think?

Answer 2

-1/5x - 4 > -3