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Forum URL:	http://www.cut-the-knot.org/cgi-bin/dcforum/forumctk.cgi
Forum Name:	High school
Topic ID:	222
Message ID:	3
#3, RE: equation for a vertical line Posted by alexb on Jan-20-03 at 01:29 PM In response to message #0 Try http://www.cut-the-knot.com/Curriculum/Calculus/StraightLine.shtml