The graph below shows the number of gallons of water remaini

The graph below shows the number of gallons of water remaining in a pool x minutes after a valve is opened to drain the pool. Find the slope m of the line m = thousand gallons per minute. Write a sentence that states the meaning of the slope. Each minute gal are being drained from the pool.

Solution

Slope = (y2 - y1) / (x2 - x1)

= (31 - 7) / (0 - 10)

= 24/-10

= -2.4

So, m = -2.4 ----> FIRST ANSWER

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Each min, 2.4 gallon are being drained from the pool