document.write( "Question 188091: which of the following relations is a function?
\n" ); document.write( "{(3,4),(-3,1),(4,4),(0,7)}
\n" ); document.write( "{(0,4),(-3,1),(2,-4),(0,7)}
\n" ); document.write( "{(4,4),(-3,1),(4,-4),(0,7)}
\n" ); document.write( "{(2,4),(3,1),(3,-4),(-3,7)}
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Algebra.Com's Answer #140982 by Mathtut(3670)\"\" \"About 
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{(3,4),(-3,1),(4,4),(0,7)}
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\n" ); document.write( "remember in a function there can be one and only one y value for each x value
\n" ); document.write( "in the other 3 there is two values of y for a given x......for instance
\n" ); document.write( "in the 2nd grouping you have (0,4) and (0,7) so for x=0 you have y=4 and 7....
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