# Find the Slope -3x-9y=9 -3x-9y=9
Rewrite in slope-intercept form.
The slope-intercept form is y=mx+b, where m is the slope and b is the y-intercept.
y=mx+b
Add 3x to both sides of the equation.
-9y=9+3x
Divide each term by -9 and simplify.
Divide each term in -9y=9+3x by -9.
-9y-9=9-9+3x-9
Cancel the common factor of -9.
Cancel the common factor.
-9y-9=9-9+3x-9
Divide y by 1.
y=9-9+3x-9
y=9-9+3x-9
Simplify 9-9+3x-9.
Simplify each term.
Divide 9 by -9.
y=-1+3x-9
Cancel the common factor of 3 and -9.
Factor 3 out of 3x.
y=-1+3(x)-9
Cancel the common factors.
Factor 3 out of -9.
y=-1+3×3⋅-3
Cancel the common factor.
y=-1+3×3⋅-3
Rewrite the expression.
y=-1+x-3
y=-1+x-3
y=-1+x-3
Move the negative in front of the fraction.
y=-1-x3
y=-1-x3
Reorder -1 and -x3.
y=-x3-1
y=-x3-1
y=-x3-1
Rewrite in slope-intercept form.
y=-13x-1
y=-13x-1
Using the slope-intercept form, the slope is -13.
m=-13
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