document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=7134>Question 7134</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Hello, My question is about relations and functions.  On my homework, it says, \"For each set of points, identify the domain, the range, and tell whether it is a function or not.\"  One of the problems is {(2,3),(3,7),(5,-1),(0,0)}.  How do i know whether it is a function or not?\r<BR>\n" );
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document.write( "Many thanks,<BR>\n" );
document.write( "Sarah\r<BR>\n" );
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document.write( "Please email me at sayray4209@yahoo.com </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #3944 by </B><A HREF=/tutors/aboutme.mpl?userid=glabow><B>glabow(165)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=glabow><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=3944\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The definition of a function is that for each value in the domain there is only one value in the range; restated: for each value x, there is only one value y which is determined by x.<BR>\n" );
document.write( "You have a list of number pairs. Is there any value of x for which there is more than one value of y? If there is, the relationship between the two sets of numbers is not a function. If there isn't, then the relationship is a function.<BR>\n" );
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