What is the equation for y=-x+6 of X and Y?

-6, - 3, 2, 4, 7

Y=-x+6

Try - 6 on X, - (-6) + 6=12 ... wrong

Try - 3 on X, - (-3) + 6=9 ... wrong

Try 2 on X, - 2+6=4 ... correct, you got X=2, Y=4

Try 4 on X, - 4+6=2 ... correct, you got X=4, Y=2

Try 7 on X, - 7+6=1 ... wrong