Question 893360
{{{-y=-kx-1/3}}}
{{{highlight_green(y=kx+1/3)}}};


The second equation is {{{highlight_green(y=-2x+1/3)}}}.


If slopes were equal, k=-2, and these two lines would be the same identical line.  To make them each DIFFERENT lines, then any k such that {{{k<>-2}}} will work.  As long as {{{k<>-2}}}, the two lines will intersect in exactly one point.