document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=286828>Question 286828</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the slope of the line... x=4 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #208011 by </B><A HREF=/tutors/aboutme.mpl?userid=PRMath><B>PRMath(133)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=PRMath><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=208011\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> x = 4 is a VERTICAL line.  All vertical lines have an UNDEFINED slope.\r<BR>\n" );
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document.write( "If it had been y = 4, then you would have had a horizontal line, and horizontal lines have a slope of ZERO.\r<BR>\n" );
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document.write( "I hope this helps.  </SPAN>\n" );
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