Question 539531
 If the coordinates of A and B are ( x1, y1) and ( x2, y2) respectively, then the midpoint, M, of AB is given by the following formula 														
(	12	,	-2	)  	(	20	,	-6	)   					
M(x,y) ={{{(x1+x2)/2	}}}	{{{	(y1+y2)/2}}}							
x= 	(	12	+	20	)/	2	y=	(	-2		-6	)/	2	
x= 	16		,y=	-4

The slope of this line 
x1		y1	x2	y2				
12	*	-2	20	-6				
								
slope m =		(y2-y1)/(x2-x1)						
(	-6	-	-2	)/(	20	-	12	) 
(	-4	/	8	)  				
m=		-  1/ 2	

The line perpendicular to this line will have a slope of 2 and passing through (16,-4)

m=		2      					
							
Plug value of  the slope  and point 			(	16	,	-4	) in
Y 	=	m	x 	+	b		
-4.00	=	32    	+	b			
b=	-4	-	32    				
b=	-36      						
So the equation  will be							
Y 	=	2    	x 		-36
    		
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