Using proportions, it is found that the average change in field position per running play is of -1 yard per play.
A proportion is a fraction of a total amount, and the measures are related using a rule of three. Due to this, relations between variables, either direct or inverse proportional, can be built to find the desired measures in the problem.
Researching this problem on the internet, the changes on each play are given by:
-3 yards, 2 yards, -1 yard, -2 yards, -3 yards, 1 yard.
Hence the total change in yards is given by:
-3 + 2 - 1 - 2 - 3 + 1 = -6 yards.
There were 6 plays, hence the average change in field position per running play is of:
-6/6 = -1 yard per play.
More can be learned about proportions at https://brainly.com/question/24372153
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