find output y, when the input x, is -9.

y output = 1

Step-by-step explanation:

If you look at the image, look where x equals -9. Look at what points are on that line called x=-9. We see the x=-9 line intersects the blue line system at (-9,1). We now know that the y output for x input being -9, is 1.

Hope this helps(would be grateful if you would make my answer branliest because I need brainliest answers for leveling up.)

answer: x=60