Question 702503
{{{ -2x + By = C }}}
First, put it into the slope-intercept form
Add {{{ 2x }}} to both sides
{{{ By = 2x + C }}}
Divide both sides by {{{ B }}}
{{{ y = ( 2/B)*x + C/B }}}
The slope is {{{ 2/B }}}
The y-intercept is {{{ C/B }}}
If {{{ B }}} is negative and {{{ C }}} is positive,
both the slope and y-intercept 
will be negative
I will say:
{{{ B = -2 }}}
{{{ C = 2 }}}
{{{ y = ( 2/B)*x + C/B }}}
{{{ y = ( 2/(-2))*x + 2/(-2) }}}
{{{ y = -x - 1 }}}
Here's the plot:
{{{ graph( 400, 400, -5, 5, -5, 5, -x -1 ) }}}