The answer is D.
First, the equation to find the perpendicular line to a given line is

, where

is the m value of the equation of the second line and

is the m value of the equation of the first line.
Using this, we can find the slope of the equation of the perpendicular line:

= -1/(1/4)= -4
So now our options are slimmed down to C and D. We can tell which equation is correct by substituting the given coordinates
C: -6+2≠-4(-2+6), so this option is eliminated
D: -6+6=-4(-2+2), so this is our answer as both sides equal 0
Because 5 is in this set, you can already exclude B. 2's factors can not be odd, so that excludes D. and 3's factors doesn't include 20, so you can exclude A.
Answer would be C.
-1.118670886075949 is your answer.