Question 1020378
{{{4x-2y=9}}}
{{{-2y=-4x+9}}}
{{{y=2x-9/2}}}
Slope is 2.


Any line perpendicular to the given line must have slope  {{{-1/2}}}.  Such a line to pass through (8,-2), using the point-slope equation form, will be  {{{y-(-2)=-(1/2)(x-8)}}}.  Do what you need or want from this form.