9. Which graph can be used to find the solution to the system of equations? y = x-1
9y = 6x – 15

I used desmos and plotted the equations in. I would find which graphs cross one another at (-2,-3)

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.