Samantha measured #40 1/2# inches. Over the next #5 1/2# years, she grew to a height of 57 inches. During the #5 1/2# years, what was the average yearly change in Samantha's height?
1 Answer
Apr 8, 2017
Explained the principle behind cancelling out.
Average (mean) change in height is 3 inches per year
Explanation:
The total change is final height - initial height
This difference is spread over
So the average (mean) change for each year is:
This is the same as:
But
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~