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Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

In order for the function to be linear, what must m be and why? m = 22 because the rate of change is 1. m = 20 because the rate of change is 3. m = 22 because the rate of change is -1. m = 20 because the rate of change is -3.

Solve the equation: x - 9 = -6 + 5 a. 21 b. 7 c. 14 d. 2