Answer:
-1/2 or -0.5
Step-by-step explanation:
using y2-y1/x2-x1 on any two points: 2.5-5/1--4 = -1/2 or -0.5
the top one, (-1,3)
-3x +1y +8x -8y
=5x-7y
The answer is: 5x-7y
i think its 150
