Read the photos that I've attached please

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.

The focus of a parabola is (-4,-5) and its directrix is y=-1 find the equation

Which expression gives the distance between the two points 2 5 and 4 8