document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=981727>Question 981727</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Which of the relations given by the following sets of ordered pairs is a function?\r<BR>\n" );
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document.write( "{(1, 1), (1, 3), (1, 5), (1, 7), (1, 9)}\r<BR>\n" );
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document.write( "{(-2, 1), (7, 5), (-4,0),(3,1),(0,-6)}\r<BR>\n" );
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document.write( "{(1,2),(2,3),(3,4), (3,3),(2,2),(1,1)}\r<BR>\n" );
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document.write( "{(2, -7), (6,5),(-3,9), (2,0), (-5,3)}<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #602677 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=602677\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> To be a function, there needs to be one unique<BR>\n" );
document.write( "value of <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+y+ ALIGN=MIDDLE  ALT=\"+y+\"   DISABLED_style= \"max-width:90%; height:auto;\" > for every <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x+ ALIGN=MIDDLE  ALT=\"+x+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
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document.write( "The 1st set has 5 different values of <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+y+ ALIGN=MIDDLE  ALT=\"+y+\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "for <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+x+=+1+ ALIGN=MIDDLE  ALT=\"+x+=+1+\"   DISABLED_style= \"max-width:90%; height:auto;\" > and violates definition<BR>\n" );
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document.write( "The 2nd set is a function<BR>\n" );
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document.write( "The 3rd set has <BR>\n" );
document.write( "( 1,2 ) & ( 1,1 )<BR>\n" );
document.write( "( 2,3 ) & ( 2,2 )<BR>\n" );
document.write( "( 3,4 ) & ( 3,3 )<BR>\n" );
document.write( "Each of these pairs violates the definition<BR>\n" );
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document.write( "The 4th set has ( 2,-7 ) & ( 2,0 ) which<BR>\n" );
document.write( "violate definition\r<BR>\n" );
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