Step 1: Find the slope
(y-y)/(x-x) = (8-8)/(9+4) = 0
Step 2: Substitute into the slope intercept equation
y - y = m(x - x)
y - 8 = 0(x - 9)
If the problem just wants plain, slope intercept form, then this is your answer.
If not, y = 8
I hope this helps. Since there are verticale angles that’s why I added another x.
I think the answer should be 12.
That is the answer. you can't simplify it.