Question 180584
Midpoint of (2,4) and (-6, 10):


x_mid: (2-6)/2=-4/2=-2

y_mid: (4+10)/2=14/2=7


Midpoint: (-2,7)



Any line perpendicular to y=3 is equation x=k (k is any number)


Equation is x=-2 (it's x-coordinate of midpoint)