You can put this solution on YOUR website! -3x -9y = 18
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Reorganize to point-slope format: y = mx +b.
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Add 3x to both sides
-9y = 3x + 18
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Divide both sides by -9.
y = -(3/9)x + 18/-9
y = -(1/3)x - 2
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To graph you need two points, since this is a linear equation.
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If x=0, y = -2: (0,-2)
if y=0, x = -6: (-6,0)
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You can inspect the answer to increase your confidence you are right.
The slope of -1/3 means the line goes down to the right. (It does.)
The slope of -1/3 means that for every change of 3 along x, there is -1 change along y-axis. (Check)
Done.
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