Well basically if they lost 8 points and gained 6, they have -2 points.
The answer is 10x^4 - 2x ^3
Ratios don't have to be "per" something, while rates are "per" something.
Ratios compare 2 or more values, as well as rates.
9 divided by 13 = 9/13
None of the answer above
Should be: 9 • 1/13
