Find the Equation of a Median Line

In tis video we examine how to find the equation of a median line.

[thewarfords]

I don't really know if you'll respond as its been two years but when you subbed 5 as X, does it matter what you sub exactly? Like if I just decided instead of y=1/4(5)+b I wanted it to be using -3 (The X of A) so y=1/4(-3)+b would this matter since instead we should be using the x of the midpoint or is there no real deep meaning? (Just curious I know both of them make different answers just would like to know for future reference thank you)

[elizabethtoal]

Don't mean to be rude but just for anybody who caught this too, You messed up, it's 5/4 - 1, not 1 - 5/4 because the 5/4 was already on the right and you're transferring the 1. So now you have an answer that is negative when it should be positive