Question 309865
The standard line equation is Y=mX+b. Where m=the slope & b=the Y intercept. 
56 + 7y = 0
7y=-56
y=-56/7
y=-8 ans. for the Y intercept.
Note that there is no X term thus there is no X intercept & the slope is assumed to be 0.
{{{ graph( 300, 200, -6, 5, -10, 10, y = -8) }}} (graph 300x200 pixels, x from -6 to 5, y from -10 to 10, y = -8).