Click an item in the list or group of pictures at the bottom of the problem and, holding the button
down, drag it into the correct position in the answer box. Release your mouse button when the item
is place. If you change your mind, drag the item to the trashcan. Click the trashcan to clear all your
answers.
Indicate the equation of the line that is the perpendicular bisector of the segment with endpoints (4,1)
and (2,-5).