document.write( "Question 142863: Which of these sets represents a function:
\n" ); document.write( "a) (2,-2), (3,-2), (2,3)
\n" ); document.write( "b) (9,pi), (5,7), (4,pi)
\n" ); document.write( "c) both
\n" ); document.write( "d) neither\r
\n" ); document.write( "\n" ); document.write( "PS: When I say pi I mean the pi sign thing.. The 3.14...Thing \r
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\n" ); document.write( "\n" ); document.write( "(PS: Please show how you worked it out. I have been having mojor problems with these kinds of questions. Thanks.) \n" ); document.write( "
Algebra.Com's Answer #103968 by vleith(2983)\"\" \"About 
You can put this solution on YOUR website!
See this --> http://www.algebra.com/cgi-bin/show-question-source.mpl?solution=102766\r
\n" ); document.write( "\n" ); document.write( "then look at the a) and b).\r
\n" ); document.write( "\n" ); document.write( "Does a have a single domain entry that has two range values (read is there an x that has more than one value for y?) Yes, x=2 yileds both -2 and 3. So a cannot be a function.\r
\n" ); document.write( "\n" ); document.write( "Does b have a single domain entry that has two range values (read is there an x that has more than one value for y?) No. there are two different values of x that yeild the same y (9 and 4 both yield pi). But that is fine.\r
\n" ); document.write( "\n" ); document.write( "So the answer is b) \n" ); document.write( "
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