Question 1075049
You mean PERPENDICULAR BISECTOR.


Slope for CD
{{{(2-5)/(3-(-3))}}}


{{{-3/6}}}


{{{-1/2}}}


and Midpoint would be  {{{system(x=(-3+3)/2=0,y=(5+2)/2=7/2=3&1/2)}}}



Your equation should use slope  {{{2}}}.

{{{y-3&1/2=2(x-0)}}}

{{{highlight(y=2x+3&1/2)}}}