Question 1017228
y=-5 is a horizontal line.
A perpendicular line must therefore have a constant x-value.  That line may have any value for y so long as the x-value is constant.
The point given is (14,-14).  The x-value given is 14.  That is the equation of the line perpendicular to y=-5.  It is x=14.  There is no y in the equation.  All that matters is that x=14.  That line will go through the point and be perpendicular to y=-5.