document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=567427>Question 567427</A>: <I><SPAN STYLE=\"word-break: break-all;\"> which of the following represents a lie perpendicular to 9x-3y=7?<BR>\n" );
document.write( "-81x-3y=7<BR>\n" );
document.write( "-81x-27y=7<BR>\n" );
document.write( "-3x+9y=7<BR>\n" );
document.write( "27x+81y=7 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #366575 by </B><A HREF=/tutors/aboutme.mpl?userid=mananth><B>mananth(16946)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=mananth><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/cgi-bin/show-face.mpl?user=mananth><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=366575\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 9x-3y=7?\r<BR>\n" );
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document.write( "convert to slope intercept form\r<BR>\n" );
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document.write( "3y=9x-7<BR>\n" );
document.write( "/3<BR>\n" );
document.write( "y=3x-7/3\r<BR>\n" );
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document.write( "slope = 3\r<BR>\n" );
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document.write( "the perpendicular line will have a slope of -1/3 ( negative reciprocal)\r<BR>\n" );
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document.write( "...\r<BR>\n" );
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document.write( "27x+81y=7<BR>\n" );
document.write( "81y=-27x+7<BR>\n" );
document.write( "/81<BR>\n" );
document.write( "y=(-27/81)x+7/81\r<BR>\n" );
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document.write( "y=(-1/3)x+7/81\r<BR>\n" );
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document.write( "this line is perpendicular<BR>\n" );
document.write( " </SPAN>\n" );
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