I need help with this double trig problem!!

Ab and bc are tangent to circle d. find x is ab = 3x + 8 and bc = 26. find x

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.

Which point-slope form equation represents a line that passes through (3,-2) with a slope of -4/5