# Find the slope perpendicular to x+y=−3

Find the slope perpendicular to $x+y=-3$
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Zayne Wagner
If we rewrite x+y=−3 in slope-intercept form, we get
$y=\left(-1\right)x-3$ with a slope of m=(−1)
For any slope m, the slope perpendicular to it is $\left(-\frac{1}{m}\right)$
So the slope perpendicular to x+y=−3 is $\left(-\frac{1}{-1}\right)=1$