Question

Find the error & explain why it is wrong:

Laural had to find the average rate of change of f(x) over the interval from x = 6 to x = 10 using the table below.

What did she do wrong?

Answer 1

Step b is wrong. The slope is the change in y over the change in x.

Step b should be (18- 8)/( 10-6)

= 10/4

= 5/2