I need help i dont get it comment if you need anything

3382-299=3383- ? fill in the blank?

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.

Show all work to identify the discontinuity and zero of the function f of x equals 6 x over quantity x squared minus 36