Answer:
-11
Step-by-step explanation:
To get the y-intercept, we need to get the slope first
Slope = y2-y1/x2-x1
Slope = -20-1/-3-4
slope = -21/-7
Slope = 3
Get the y-intercept. Substitute m = 3 and any point say (4, 1) into the expression y = mx+c
c is the y-intercept
1 = 3(4) + c
1 = 12 + c
c =1-12
c = -11
Hence the y-intercept is -11
