I'm very confuesed where to start this problem:

Graph - 18x+9y=72

y=-2x+8

Step-by-step explanation:

first you have to - 18x on both sides because you want to get y by itself

9y=-18x+72

then divide 9 by both sides

9y/9=-18x+72/9 ... - 18/9=-2 and 72/9=8

y=-2x+8

-2x is your slope and 8 is your y intercept