General Idea:
When we are given Time ' t ' in minutes and Volume ' V ' in liters, the speed at which the volume changes is given by its slope. That is change in Volume with respect to Change in time.
[tex] m = \frac{V_{2}-V_{1}}{t_{2}-t_{1}} [/tex]
Applying the Concept:
From the table picking the first two points (2, 184) and (7, 94)
[tex] Rate \; at \; which \; Volume \; is \; remaining \; in \; pool \\\\
Volume \; Rate_{\; Remaining}=\frac{94-184}{7-2}= \frac{-90}{5} =-18 [/tex]
Conclusion:
The rate at which Isabella fill her pool = 18 liters/minute
