PLEASE HELP ON GEOMETRY HOMEWORK 25 POINTS!

Which shows the pre image of triangle xyz

If t8 = 4 and t12 = −2, find the first three terms of the arithmetic sequence.

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.