document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=751189>Question 751189</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help with these.  <BR>\n" );
document.write( "Determine whether each set of  ordered pairs is a function.<BR>\n" );
document.write( "1.  (4,1)(3,2)(2,3)(1,8)<BR>\n" );
document.write( "2.  (1,3)(2,3)(3,3)(4,3)<BR>\n" );
document.write( "3.  (1,1)(2,2)(3,3)(4,4)<BR>\n" );
document.write( "4.  (2,1)(4,2)(5,3)(-2,4)<BR>\n" );
document.write( "5.  (8,1)(8,2)(8,3)(8,4)<BR>\n" );
document.write( "6.  (-2,-2)(0,0)(6,6)(-8,-8)\r<BR>\n" );
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document.write( "thank you for your help.<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 #457038 by </B><A HREF=/tutors/aboutme.mpl?userid=tommyt3rd><B>tommyt3rd(5050)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=tommyt3rd><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=tommyt3rd><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=457038\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Elements in the domain are mapped to exactly one element in the codomain, therefore:\r<BR>\n" );
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document.write( "1.  (4,1)(3,2)(2,3)(1,8)  yes<BR>\n" );
document.write( "2.  (1,3)(2,3)(3,3)(4,3)  yes<BR>\n" );
document.write( "3.  (1,1)(2,2)(3,3)(4,4)  yes <BR>\n" );
document.write( "4.  (2,1)(4,2)(5,3)(-2,4) yes<BR>\n" );
document.write( "5.  (8,1)(8,2)(8,3)(8,4)   no!<BR>\n" );
document.write( "6.  (-2,-2)(0,0)(6,6)(-8,-8)  yes\r<BR>\n" );
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document.write( ":)\r<BR>\n" );
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