Question 881968
Know these:
{{{y=mx+b}}}, {{{b=y-mx}}};
{{{m=(y-v)/(x-u)}}} for some given point (u,v).
Slope for line perpendicular is {{{-(x-u)/(y-v)}}}.

and know point-slope form:  {{{y-v=m(x-u)}}}.



Line you want:
{{{y-1=((-1)((4-(-2))/(1-(-6))))(x-4)}}}