Question 142117
You must get {{{y}}} alone on the left side. To do this,
subtract {{{x}}} from both sides
{{{y + x = -8}}}
{{{-x = -x}}}
{{{y = -x - 8}}}
This is the equation you must plot
{{{ graph( 600, 600, -10, 2, -10, 2, -x - 8) }}}
The y-intercept occurs where {{{x = 0}}}. Just make
{{{x=0}}} in the equation
{{{y = 0 - 8}}}
{{{y = -8}}} You can see from the graph that this is 
where the line intercepts the y-axis