Answer:
The missing y -coordinate is 0.
Explanation:
Here we know the slope but must find the y-coefficient of one of the points.
y - 2
The slope is m = 1/2 = rise / run = ----------
3 - 7
y - 2
or 1/2 = ---------- which simplifies to -2 = y - 2, which yields y = 0.
-4
The missing y -coordinate is 0.