Answer:
The average rate of change as follows of I is -0.185.
Step-by-step explanation:
The relation between voltage V, current I, and resistance R in a circuit, according to the Ohm's law is:

It is provided that:
<em>V</em> = 20 V
The interval between which R varies is, R = 8 to R = 8.1.
Compute the value of I as follows:

Compute the average rate of change as follows of I as follows:

![=\frac{1}{0.1}[\frac{12}{8.1}-\frac{12}{8}]](https://tex.z-dn.net/?f=%3D%5Cfrac%7B1%7D%7B0.1%7D%5B%5Cfrac%7B12%7D%7B8.1%7D-%5Cfrac%7B12%7D%7B8%7D%5D)
![=\frac{12}{0.1}[\frac{8-8.1}{64.8}]](https://tex.z-dn.net/?f=%3D%5Cfrac%7B12%7D%7B0.1%7D%5B%5Cfrac%7B8-8.1%7D%7B64.8%7D%5D)

Thus, the average rate of change as follows of I is -0.185.