Answer:0/-9
Explanation:
the equation is m= y2-y1/x2-x1. the coordinates are set up as (x,y), so the first set of coordinates are (x1, y1) and the second set is (x2-y2). so, you plug in the numbers to solve for slope. 8-8/ -5-4, which equals 0/-9. this means, your slope is a straight line.