Answer:
y = -1/2x -2
Explanation:
Slope intercept form is y = mx+b where m is the slope and b is the y intercept
We need to solve for y
3x+6y=-12
Subtract 3x from each side
3x-3x+6y = -3x-12
6y = -3x-12
Divide each side by 6
6y/6 = -3x/6 -12/6
y = -1/2x -2
This in in slope intercept form where the slope is -1/2 and the y intercept is -2