document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=204991>Question 204991</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Explain why the line x = 4 is a vertical line. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #154729 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=154729\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Explain why the line x = 4 is a vertical line.<BR>\n" );
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document.write( "Plot two points where x = 4 such as (4,2) and (4,6)<BR>\n" );
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document.write( "Plot those two points and draw a line thru them.<BR>\n" );
document.write( "You will see that you get a vertical line.<BR>\n" );
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document.write( "Also, if you calculate a slope thru those points <BR>\n" );
document.write( "you will get (6-2)/(0) which is undefined.  That is<BR>\n" );
document.write( "the slope of a vertical line.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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