Answer:
slope equals 1
Explanation:
To do this you would need to do an equation that is 
 so in this case -8 would be y2 and -4 would be y1 and 4 would be x2 and 8 would b e x1 so if you plug it into the equation we would get
 so in this case -8 would be y2 and -4 would be y1 and 4 would be x2 and 8 would b e x1 so if you plug it into the equation we would get 
 and if we simplify we get
 and if we simplify we get 
 which simplifies to 1 so the slope would equal 1
 which simplifies to 1 so the slope would equal 1