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what is the slope intercept form of y+x=0?

I need to know m and b

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Vivian L. | Microsoft Word/Excel/Outlook, essay composition, math; I LOVE TO TEACHMicrosoft Word/Excel/Outlook, essay comp...
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Hi Kynzie;
y+x=0
Slope-intercept form is y=mx+b.
m is the slope.
b is the y-intercept, the value of y when x=0.
y+x=0
Let's subtract x from both sides...
-x+y+x=0-x
y=-x+0
We do not need the zero, except to highlight the fact that the y-intercept is 0.
The slope is -1.
y=-x
Parviz F. | Mathematics professor at Community CollegesMathematics professor at Community Colle...
4.8 4.8 (4 lesson ratings) (4)
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 Given Y + x = 0   
    To find Y intercept , and slope you need to make it in the form of  Y = mx +b
 
     in this case:
                Y + X = 0
       becomes  Y = -x
 
            slope coefficient of  X , m = -1
 
             and b = 0
     The line goes through origin.