Answer:
-3/4
Step-by-step explanation:
Using the coordinate points (-2, 0) and (0, -1.5)
Slope m = y2-y1/x2-x1
From the coordinates x1 = -2, y1 = 0, x2 = 0 and y2 = -1.5
Slope m = -1.5-0/0-(-2)
Slope m = -1.5/2
Slope m = -15/10 * 1/2
Slope m = -15/20
Slope m = -3/4
Hence the slope of the red line is -3/4