document.write( "Question 638906: Determine whether or not the relation is a function.
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Algebra.Com's Answer #402500 by KMST(5328)\"\" \"About 
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A relation is a function if every x in its domain is paired with only one y value.
\n" ); document.write( "(Each x has to be faithful to its y).
\n" ); document.write( "The relation given is a function because:
\n" ); document.write( "there are only four (x,y) pairs given, and they have all different x values.
\n" ); document.write( "There is no x that is paired with two or more y values.
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