document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=885590>Question 885590</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Which relation is a function?<BR>\n" );
document.write( "A.<BR>\n" );
document.write( "(5, –2), (4, 6), (–3, –2), (0, 4)<BR>\n" );
document.write( "B.<BR>\n" );
document.write( "(–1, –2), (3, –5), (–1, –5), (2, –2)<BR>\n" );
document.write( "C.<BR>\n" );
document.write( "(4, 3), (3, 2), (–1, 5), (4, 0)<BR>\n" );
document.write( "D.<BR>\n" );
document.write( "(–4, –4), (3, –3), (–4, 4), (–3, 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 #535265 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=535265\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> A.<BR>\n" );
document.write( "(5, –2), (4, 6), (–3, –2), (0, 4)\r<BR>\n" );
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document.write( "This is a function since each x value maps to exactly one y value. There are NO repeated x values.\r<BR>\n" );
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document.write( "B.<BR>\n" );
document.write( "(–1, –2), (3, –5), (–1, –5), (2, –2)\r<BR>\n" );
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document.write( "Notice how we have x = -1 mapping to y = -2 and y = -5 at the same time. This means this is NOT a function<BR>\n" );
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document.write( "C.<BR>\n" );
document.write( "(4, 3), (3, 2), (–1, 5), (4, 0)\r<BR>\n" );
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document.write( "Like in choice B, we have x = 4 paired with y = 3 and y = 0 at the same time. This is NOT a function.<BR>\n" );
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document.write( "D.<BR>\n" );
document.write( "(–4, –4), (3, –3), (–4, 4), (–3, 3)\r<BR>\n" );
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document.write( "When x = -4 the value of y is y = -4 and y = 4. We do NOT have a function here.\r<BR>\n" );
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document.write( "Final Answer: Only choice A is a function. </SPAN>\n" );
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