I need help please I don’t get it

Answer:
Step-by-step explanation:
The slope of a line can be found with any two points.
Slope, or m, is defined as
m=(y2-y1)/(x2-x1)
So we pick any two points on the line, I’ll choose
(-1,1) and (1,-1) so
m=(-1-1)/(1-(-1))
m=-2/2
m=-1