document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=42006>Question 42006</A>: <I><SPAN STYLE=\"word-break: break-all;\"> if the slope of a line is undefined, then the line must be:<BR>\n" );
document.write( "a.horizontal<BR>\n" );
document.write( "b.vertical<BR>\n" );
document.write( "c.diagonal<BR>\n" );
document.write( "d.other<BR>\n" );
document.write( "Which answer is correct? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #27148 by </B><A HREF=/tutors/aboutme.mpl?userid=checkley71><B>checkley71(8403)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=checkley71><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=27148\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> ANS. IS b) vertical because the formula is (y2-y1)/(x2-x1) & if the x coordinates are the same  then the denominator is =0 which makes the fraction/slope undefined.  </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );