n has less than 75 copies
sold 12
so add the 12 back
n had less than 87 copies in the beginning of the day
:)
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It's B because if you flip it to left (y axis) the x would become a negative
To be honest I would need a picture to answer this question
The independent variable is the rate that water is flowing into the pool, and the dependent variable is the depth of water in the pool.
I believe this would be the case due to the fact that we are not in control of the flow yet the flow impacts the depth. So flow would be independent while the pool depth would be dependent on the rate of flow.