EXPLAIN WITH STEPS
BOTH QUESTIONS 9 AND 10

9. the slope is -4

10. Max: (-2, 22.667) Min: (1.431, -7.155)

Step-by-step explanation:

The explanation and work in in the attached picture.

I rounded to 3 decimal points because that's what the US AP test wants

4 times

Step-by-step explanation:

1 quart is equivalent to 32 fluid ounces.

If each eruption consumes 8 fluid ounces of vinegar. Assuming that the amount of vinegar required per eruption is constant, the number of times Tanvi can make her volcano erupt is:

Tanvi can make her volcano erupt 4 times  with 1 quart of vinegar.