Answer: The slope (m) of the line using two points where the line goes through is:
m = - 4 (negative 4).
Solution:
m=(y2-y1) / (x2-x1)
Taking two points in the graph where the line goes through:
P1=(0,2)=(x1,y1)→x1=0, y1=2
P2=(1,-2)=(x2,y2)→x2=1, y2=-2
Replacing in the formula of the slope:
m=(-2-2) / (1-0)
m=(-4) / (1)
m=-4