document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=178862>Question 178862</A>: <I><SPAN STYLE=\"word-break: break-all;\"> is lines slope undefined when the 0 is on top of the fraction or the bottom of the fraction  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #133805 by </B><A HREF=/tutors/aboutme.mpl?userid=EMStelley><B>EMStelley(208)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=EMStelley><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=EMStelley><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=133805\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> When the 0 is on the \"top\" of the fraction, that would mean that the two y-values are the same.  Thus that line is horizontal (slope of 0).  If the \"bottom\" of the fraction is 0 that means the two x-values are the same.  Thus that line is vertical (undefined slope). </SPAN>\n" );
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