Answer:
?=38
average rate of change =3 (on the way they partitioned the x's)
Explanation:
This is a line because it has the same rise/run (
) per pair of points.
That is, the following are equal:



The slope (also called the rate of change) is 3.
This means the calculating of the last pair of points should have the same rise/run.
That is we should have:


Multiply both sides by 4:

Add 26 on both sides:

