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The equation is 
The equation in slope-intercept form y = mx + c
Make a table; choose some values for x and find the corresponding values for y. \
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x \ | \
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Coordinates (x, y) \ | \
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-18 \ | \
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(-18,27) \ | \
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-9 \ | \
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(-9,18) \ | \
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0 \ | \
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(0,9) \ | \
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9 \ | \
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(9,0) \ | \
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18 \ | \
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(18,-9) \ | \
Use these ordered pairs to graph the equation.
\1. Draw a coordinate plane.
\2. Plot the points.
\3. Draw a line through these points.
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