document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=155090>Question 155090</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Why is x = 4 a vertical line<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #114177 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=114177\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Plot two points with x=4<BR>\n" );
document.write( "For example: (4,-2) and (4,3)<BR>\n" );
document.write( "Draw a line thru them and you will see you get a vertical line.<BR>\n" );
document.write( "--------------------------------<BR>\n" );
document.write( "Also if you calculate the slope of the line thru those two points<BR>\n" );
document.write( "you get m = (3--2)/(4-4) = 5/0<BR>\n" );
document.write( "Such a slope is a vertical line.<BR>\n" );
document.write( "=================================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );