Answer:
-1.5 or 1 1/2
Explanation:
from the graph you see on Y-axis when Y =2, x=0. so you got a point: (0,2)
then on the right lower quadrant, when x = 2, y = -1, another point (2,-1)
slope = (y2 -y1)/(x2-x1) = [2-(-1)] / (0-2) =-1.5
the way the slope's direction is, you know the slope must be negative.