document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=634343>Question 634343</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Is { (13,14), (12,5) , (16,7), (13, 14), (-2, 33), (13, 14 } a function?<BR>\n" );
document.write( "and give an explanation.. thanks! :)<BR>\n" );
document.write( "-apple  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #399570 by </B><A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><B>jim_thompson5910(35256)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=jim_thompson5910><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=399570\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> { (13,14), (12,5) , (16,7), (13, 14), (-2, 33), (13, 14 }\r<BR>\n" );
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document.write( "is the same as\r<BR>\n" );
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document.write( "{ (13,14), (12,5) , (16,7), (-2, 33)}\r<BR>\n" );
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document.write( "after you remove all the duplicates\r<BR>\n" );
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document.write( "Since each x maps to ONLY ONE y value, this means that this relation is indeed a function. If we had for instance x = 12 mapping to both y = 5 and y = 8 at the same time, then it wouldn't be a function. But that's not the case here.\r<BR>\n" );
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document.write( "So this relation <font color=\"red\">is a function</font>. </SPAN>\n" );
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