document.write( "Question 113852: determine which two equation represent perpendicular lines. \r
\n" ); document.write( "\n" ); document.write( "a) y=4/7x-3
\n" ); document.write( "b) y=3x-4/7
\n" ); document.write( "c) y=-1/3x+4/7
\n" ); document.write( "d) y=1/3x-4/7
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Algebra.Com's Answer #82859 by edjones(8007)\"\" \"About 
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b and c.
\n" ); document.write( "y=mx+b
\n" ); document.write( "In order to form perpendicular lines the slope(m) of one has to be the negative reciprocal of the other.
\n" ); document.write( "the negative reciprocal of 3 is -1/3 and vice versa.
\n" ); document.write( "Ed
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