document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=151370>Question 151370</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Which of the following are functions? Why?\r<BR>\n" );
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document.write( "a. f(x)=2 if x>1 otherwise f(x)=-1\r<BR>\n" );
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document.write( "b. f(x)=5 if x>0 or f(x)=-5 if x<0 or f(x)=5 or -5 if x= 0\r<BR>\n" );
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document.write( "c. f(x)= x/10 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #111259 by </B><A HREF=/tutors/aboutme.mpl?userid=oscargut><B>oscargut(2103)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=oscargut><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=oscargut><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=111259\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> a) and c) are functions<BR>\n" );
document.write( "but b) is not a function because is not well defined at 0 </SPAN>\n" );
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