We are given : A football team loses 108 yards in 12 plays.
Because the football team loses 108 yards, we would take a negative value for loses.
Therefore, total loss =-108 yards.
1) According to first part we need to find the average loss per play.
Total number of plays = 12.
Therefore, the average loss per play = -108/12.
Therefore, correct option is C option.
2) On dividing -108 by 12, we get -9.
Therefore, -9 tells the average change in field position for each of the 12 plays.