Answer
The slope is $-1$, and the $y-$ intercept is $-6$.
Work Step by Step
The given equation is
$\Rightarrow x+y=-6$
Subtract $x$ from each side.
$\Rightarrow x+y-x=-6-x$
Simplify.
$\Rightarrow y=-x-6$
The slope-intercept form is
$\Rightarrow y=mx+b$
$y-$intercept is $b=-6$.
The slope is $m=-1$
Hence, the slope is $-1$, and the $y-$ intercept is $-6$.
