Answer:
y = -3x - 4
Step-by-step explanation:
Find the slope.
y2-y1/x2-x1
-9/3 = -3
-3 is the slope. You know the y-intercept is -4 since (0, -4) is a point. The y-intercept is the value of y where x = 0.
So if you know the slope is -3 and the y-intercept is -4, plug it into slope-intercept form.
y = mx+b
y = -3x - 4
