Question 855290
Convert to slope-intercept form, {{{y=mx+b}}}
{{{-x-3y=-1}}}
{{{3y=-x+1}}}
{{{y=-(1/3)x+1}}}
Parallel lines have identical slopes, {{{m[par]=-1/3}}}
Perpendicular lines have slopes that are negative reciprocals.
{{{m[perp]*(-1/3)=-1}}}
{{{m[perp]=3}}}