Answer
The slope of the line is 0 and the y-intercept is (0,-6).
Work Step by Step
The line $6+y=0$ also can be written as $y=-6=0x-6$. This line is written in the form $y=mx+b$, where m is the slope of the line and the point (0,b) is the y-intercept.
$m=0$ and $b=-6$
Therefore, the slope of the line is 0 and the y-intercept is (0,-6).