Question

Hi I have a meeting at this time I can but

Answer 1

According to the graph, we can check that, at t = 5.5 hours, the price of the commodity is approximately 11.75 $/lb and, at t = 4.5 hours, the price is approximately 13.75 $/lb. Therefore, we can approximate f'(5) as the slope of the segment connecting these two points as follows:

`f^(\prime)(5)\cong(11.75-13.75)/(5.5-4.5)=-2\frac{\text{ \$}}{lb\cdot h}`