B. x=-8, y=-17.
First equate the two equations:
3x+7 = x-9
then simplify
2x = -16
x = -8
so y = x-9 = -8-9 = -17
That is it in simplest form, there is nothing else you can do to it.
Hope this helps :)
Answer: The first graph
Step-by-step explanation:
It's the first one. I don't know how to explain, haha.