Question 930680

slope-intercept form of linear equation is {{{y=mx+b}}} where {{{m}}} is slope and {{{b}}} is y-intercept

you have
{{{y = -3.5x - 3.5}}}=> {{{m[1]=-3.5}}} and {{{b[1]=-3.5}}}
{{{y = -3.5x + 3.5}}}=> {{{m[2]=-3.5}}} and {{{b[2]=3.5}}}

as you can see, both lines have same slope of {{{-3.5}}}, but different y-intercepts

if both lines have same slope they will never cross, they are parallel; so, this system is called inconsistent 


{{{ graph( 600, 600, -10, 10, -10, 10, -3.5x - 3.5, -3.5x + 3.5) }}}