document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=91101>Question 91101</A>: <I><SPAN STYLE=\"word-break: break-all;\"> My question is: Why is line x=4 a vertical line?\r<BR>\n" );
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document.write( "Thanks. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #66123 by </B><A HREF=/tutors/aboutme.mpl?userid=psbhowmick><B>psbhowmick(878)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=psbhowmick><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=psbhowmick><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=66123\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> All the points on the line x = 4 have abscissa (x-coordinate) 4.<BR>\n" );
document.write( "This means all the points on this line are at an equal perpendicular-distance (= 4 units) from the y-axis.<BR>\n" );
document.write( "So it is clear that this line is parallel to the y-axis.<BR>\n" );
document.write( "Hence, x = 4 should also be vertical as y-axis is itself vertical. </SPAN>\n" );
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