document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=148812>Question 148812</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0078279992/algebrahomeworkh>Glencoe Algebra 2</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Which if the following is a function?<BR>\n" );
document.write( "[(-4,1),(1,8),(-4,-2)]<BR>\n" );
document.write( "[(-4,1),(1,-8),(-2,-2)]<BR>\n" );
document.write( "[(-4,1),(1,-8),(1,-2)] </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #109146 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=109146\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> For it to be a function, there must be a unique 'y' for every 'x'.<BR>\n" );
document.write( ".<BR>\n" );
document.write( "So, in the case of your problem:<BR>\n" );
document.write( "[(-4,1),(1,8),(-4,-2)]<BR>\n" );
document.write( "[(-4,1),(1,-8),(-2,-2)]<BR>\n" );
document.write( "[(-4,1),(1,-8),(1,-2)]<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Set 1: when x=-4 there are two possible y's<BR>\n" );
document.write( "Set 3: when x=1 there are two possible y's<BR>\n" );
document.write( ".<BR>\n" );
document.write( "Therefore the only set that can be a function is Set 2. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );