document.write( "Question 787138: 1.
\n" ); document.write( "Which of the following relations is a function?\r
\n" ); document.write( "\n" ); document.write( "A. {(-4, 3), (-4, 2), (1, 9), (6, 7)}
\n" ); document.write( "B. {(-4, 3), (-2, 0), (2, 7), (3, 9)}
\n" ); document.write( "C. {(2, 1), (4, 2), (2, 3), (8, 4)}
\n" ); document.write( "D. {(0, 0), (0, 1), (2, 3), (4, 5)} \n" ); document.write( "
Algebra.Com's Answer #478112 by Edwin McCravy(20059)\"\" \"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. {(-4, 3), (-4, 2), (1, 9), (6, 7)}
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document.write( "This is not a function because (-4,3) and (-4,2) are \r\n" );
document.write( "two ordered pairs with the same first coordinate -4.

\n" ); document.write( "B. {(-4, 3), (-2, 0), (2, 7), (3, 9)}
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document.write( "This is a function because all the ordered pairs \r\n" );
document.write( "have different first coordinates.

\n" ); document.write( "C. {(2, 1), (4, 2), (2, 3), (8, 4)}
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document.write( "This is not a function because (2,1) and (2,3) are \r\n" );
document.write( "two ordered pairs with the same fi1st coordinate 2.

\n" ); document.write( "D. {(0, 0), (0, 1), (2, 3), (4, 5)}
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document.write( "This is not a function because (0,0) and (0,1) are \r\n" );
document.write( "two ordered pairs with the same first coordinate 0.
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\n" ); document.write( "\n" ); document.write( "Edwin \n" ); document.write( "
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