the line r≅x+2y-9=0 is the perpendicular bisector of the line segment AB whose endpoint A has the coordinates (2, 1). Find the coordinates of the other endpoint.

idk what this means...my friend just asked me this...any ideas?

Question

the line r≅x+2y-9=0 is the perpendicular bisector of the line segment AB whose endpoint A has the coordinates (2, 1). Find the coordinates of the other endpoint.

idk what this means...my friend just asked me this...any ideas?

anonymous · Answer

|dw:1340153741428:dw|Okay. 
First, the situation is like this.

lgbasallote · Answer

now i know why i dont know this lol

anonymous · Answer

Now, 
Lets use the given info.
1. The line r is perpendicular to AB.
This implies product of slope of AB and slopr of "r" = -1.
You follow me?

anonymous · Answer

??

lgbasallote · Answer

lol nevermind..ill just tell my friend idk =))) it'll take me a while to comprehend graphing problems...and i have an important thing to study on so this isnt priority =)))

anonymous · Answer

Haha.
Okayy. Lol.
:)