document.write( "Question 787139: 3.
\n" ); document.write( "Which of the following relations is a function?\r
\n" ); document.write( "\n" ); document.write( "A. {(5, 2), (3, 2), (4, 2), (5, 1)}
\n" ); document.write( "B. {(1, 2), (1, 3), (2, 1), (3, 4)}
\n" ); document.write( "C. {(1, 3), (2, 6), (3, 8), (1, 7)}
\n" ); document.write( "D. {(1, 4), (8, 9), (10, 11), (12, 12)}\r
\n" ); document.write( "\n" ); document.write( "PLEASE HELP !! \n" ); document.write( "
Algebra.Com's Answer #478110 by Edwin McCravy(20056)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "A function cannot contain two ordered pairs with the same first coordinate.

\n" ); document.write( "A. {(5, 2), (3, 2), (4, 2), (5, 1)}
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document.write( "This is not a function because (5,2) and (5,1) are \r\n" );
document.write( "two ordered pairs with the same first coordinate 5.

\n" ); document.write( "B. {(1, 2), (1, 3), (2, 1), (3, 4)}
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document.write( "This is not a function because (1,2) and (1,3) are \r\n" );
document.write( "two ordered pairs with the same first coordinate 1.

\n" ); document.write( "C. {(1, 3), (2, 6), (3, 8), (1, 7)}
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document.write( "This is not a function because (1,3) and (1,7) are \r\n" );
document.write( "two ordered pairs with the same first coordinate 1.

\n" ); document.write( "D. {(1, 4), (8, 9), (10, 11), (12, 12)}
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document.write( "This is a function because all the ordered pairs \r\n" );
document.write( "have different first coordinates.\r\n" );
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document.write( "Edwin
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