document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=148188>Question 148188</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Determine which two equations represent perpendicular lines.<BR>\n" );
document.write( "a)y=4/9x-3\r<BR>\n" );
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document.write( "b)y=3x-4/9\r<BR>\n" );
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document.write( "c)y=-1/3x+4/9\r<BR>\n" );
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document.write( "d)y=1/3x-4/9\r<BR>\n" );
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document.write( "Can someone please help me out?\r<BR>\n" );
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document.write( "Jess </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #108583 by </B><A HREF=/tutors/aboutme.mpl?userid=mangopeeler07><B>mangopeeler07(462)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mangopeeler07><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=108583\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> answer: b and c\r<BR>\n" );
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document.write( "b)y=3x-4/9\r<BR>\n" );
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document.write( "c)y=-1/3x+4/9\r<BR>\n" );
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document.write( "Why? because their slopes are negative reciprocals of each other.\r<BR>\n" );
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document.write( "Slopes--  3x and -1/3x.\r<BR>\n" );
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document.write( "3x reciprocal: 1/3x<BR>\n" );
document.write( "negative: -1/3x\r<BR>\n" );
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document.write( "-1/3x reciprocal: -3x<BR>\n" );
document.write( "negative: 3x\r<BR>\n" );
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document.write( "If the slopes are negative reciprocals of each other, then the lines are perpendicular. Always. </SPAN>\n" );
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