document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=307165>Question 307165</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can you tell me why line x=4 is a vertical line?<BR>\n" );
document.write( "    my email address is:  angeleyessix@aol.com    \r<BR>\n" );
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document.write( "Thank you so much.<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #219740 by </B><A HREF=/tutors/aboutme.mpl?userid=Fombitz><B>Fombitz(32388)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Fombitz><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=Fombitz><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=219740\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The x-axis is horizontal.<BR>\n" );
document.write( "The y-axis is vertical.<BR>\n" );
document.write( "If you connect two points that have the same x value, (4,0) and (4,8) for instance. <BR>\n" );
document.write( "The line will be parallel to the y-axis because the x value does not change. Since the lines are parallel, then the line x=4 is also vertical. <BR>\n" );
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