document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=485437>Question 485437</A>: <I><SPAN STYLE=\"word-break: break-all;\"> {(-3, 2),   (-1, 3),   (-1, 2),   (0, 4),    (1, 1)}  {-(3, 2),   (-2, 3),   (-1, 1),   (0, 4),   (0, 1)}  {(- 3, 3),   (-2, 3),   (-1, 1),    (0, 4),     (0, 1)  }{-(3, 2),    (-2, 3)  , -(1, 2),   (0, 4),    (1, 1)} Determine which relation is a function. I am so confused!  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #332013 by </B><A HREF=/tutors/aboutme.mpl?userid=chessace><B>chessace(471)</B></A><img src=\"/images/stars/stars-10.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=chessace><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=chessace><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=332013\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A function is a relation in which value of independent variable (1st of pair) appears at most once, so<BR>\n" );
document.write( "{(-3, 2), (-1, 3), (-1, 2), (0, 4), (1, 1)} NO (-1 twice)<BR>\n" );
document.write( "{-(3, 2), (-2, 3), (-1, 1), (0, 4), (0, 1)} NO (0)<BR>\n" );
document.write( "{(- 3, 3), (-2, 3), (-1, 1), (0, 4), (0, 1)} NO (0)<BR>\n" );
document.write( "{-(3, 2), (-2, 3) , -(1, 2), (0, 4), (1, 1)} OK assuming \"-(1,2)\" means (-1,-2).<BR>\n" );
document.write( "\"-(1,2)\" is not a standard format for expressing an ordered pair; i.e., don't use it and complain if others do.<BR>\n" );
document.write( "No wonder you were confused. </SPAN>\n" );
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