Question 859978
{{{3y=6-x}}}
{{{y[1]=-(1/3)x+2}}}
.
.
{{{3x-y=7}}}
{{{y[2]=3x-7}}}
.
.
Parallel lines have slopes that are identical. Not the case here.
Perpendicular lines have slopes that are negative reciprocals of each other.
{{{m[1]*m[2]=-1}}}
{{{(-1/3)(3)=-1}}}
The lines are perpendicular.