I'll write out what I need help with.

The endpoints of a line segment are A(-7,-1) and B(5,5).

a) Determine the equation of the right bisector of AB.

I have AB's midpoint as (-1,2), AB's slope as 1/2, and the slope of the right bisector as -2.

y-2=-2(x-(-1))

y-2=-2x-2

y=-2x-2+2

y=-2x

Therefore the equation of the right bisector of AB is y=-2x

I'm not sure if that's correct. Could someone look it over and see if I made any mistakes?

I also need help with two more questions;

b) Show that the origin, (0,0), lies on the right bisector of AB.

c) Determine the equation of the circle passing through AB.

I have no idea how to answer these questions. Can someone help me with them?