document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=480715>Question 480715</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Rewrite the vertical line test as two if-then statements.\r<BR>\n" );
document.write( "\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 #329448 by </B><A HREF=/tutors/aboutme.mpl?userid=richard1234><B>richard1234(7193)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=richard1234><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=richard1234><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=329448\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You could say,\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "\"If any vertical line crosses the graph of a relation at at most one point, the relation is a function.\"\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "\"If some vertical line crosses the graph of a relation at two or more points, the relation is not a function.\" (this statement is necessary since it is not logically equivalent to the first statement)\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "Alternatively, you can condense into one if-then statement:\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( "\"Iff any vertical line crosses the graph of a relation at at most one point, the relation is a function.\" (Iff means \"if and only if\"). </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );