document.write( "Question 181556: if A-B is extended its own length at what point would it extend. A (-4,4) to B (2,8). what is the formula. the professor said something about taking the averages of the x y values. \n" ); document.write( "

Algebra.Com's Answer #136243 by Mathtut(3670) $\"\"$ $\"About$

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yes the midpoint formula states that between any two points the midpoint is
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\n" ); document.write( "((x1+x2)/2,(y1+y2)/2).....so the average of the x coordinates and the average of the y coordinates
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\n" ); document.write( "In this case we know what the midpoint is(point B). What we are after is the other endpoint lets call it C=(x,y)
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\n" ); document.write( "so we have ((-4+x)/2=2 , (4+y)/2=8)
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\n" ); document.write( "-4+x=4
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\n" ); document.write( "x=8
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\n" ); document.write( "4+y=16
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\n" ); document.write( "y=12
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\n" ); document.write( "so it would extend to C= (8,12) \n" ); document.write( "

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