Question 549562
A y-intercept of {{{8}}} means that 
{{{x=0}}} and {{{y=8}}}, so it is the point
(0,8)
Using point-slope formula:
{{{ (y - 8) / (x - 0) = -3 }}}
{{{ y - 8 = -3x }}}
{{{ y = -3x + 8 }}}Here's the plot:
{{{ graph( 400, 400, -2, 8, -8, 12, -3x + 8 ) }}}