Find Linear Function

Question

Find a linear function h, given h(4)=-4 and h(-4)=20 then find h(8).

Answer 1

What you are told is that the line passes through (4,-4) and (-4,20).

The slope of the line is (-4-20)/(4+4)=-3

then -3 = (h+4)/(x-4).

You can massage this around to any comfortable form and plug in x=8 to get your answer