document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=81566>Question 81566</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Determine which two equations represent perpendicular lines\r<BR>\n" );
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document.write( "y=3x-7,  y=1/3x+7, y=-1/3x+7, y=1/3x-7 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #58411 by </B><A HREF=/tutors/aboutme.mpl?userid=tutorcecilia><B>tutorcecilia(2152)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=tutorcecilia><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=tutorcecilia><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=58411\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The slopes of perpendicular lines are the negative reciprocals of each other:<BR>\n" );
document.write( "So, y=3x-7 and y=-1/3x+7 have slopes that are the negative reciprocals:<BR>\n" );
document.write( "That is, 3 and -1/3<BR>\n" );
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