Question 205592
Point A (-4,1) is in the standard (x,y) coordinate plane. What must be the coordinates of point B so that the line x=2 is the perpendicular bisector of AB? (with a line above the AB - what does that mean?) The answer is (8,1). How was this answer determined?
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Draw a coordinate system.
plot the point A(-4,-1)
Draw the verticle line x=2
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Notice that A is 6 to the left of x=2.
Therefore B must be 6 to the right of x=2
B is on the same y-level as A 
So B = (2+6,-1) or (8,-1)
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Cheers,
Stan H.