document.write( "Question 908092: How can I determine whether a relation is a function? \n" ); document.write( "
Algebra.Com's Answer #550803 by stanbon(75887)\"\" \"About 
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How can I determine whether a relation is a function?
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\n" ); document.write( "Each x-value in the Domain must have one and only one y value.
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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