Posted by MR. BILL on .
Which equation represents the perpendicular bisector of AB whose endpoints are A(8,2) and B(0,6)?
10 y=2x4
20 y=1/2x=2
3) y=1/2x =6
4)y=2x12
So I did Delta Y over Delta X and got 4/8 or .5. Since it says perpendicular I made it the opposite sign and flipped it and got 8/4 or 2. Then I plugged it into y=mx+b. I plugged it in using B and did 6=2(o)=b and got 6 for b but 2x6 isn't an answer choice. SO then I used A and got 2=2(8)=b and got b = 14 which is also not an answer choice.
What am i doing wrong?

Math 
drwls,
Which line goes through midpoint (4,4) and has slope 1/[4/8] = 2 ?
Only choices 1 and 4 have the correct slope.
Only #1 goes through 4,4.