document.write( "Question 255172: {(-2, 7), (-1, 5), (0, 3), (1, 1), (2, 1)} is this a function and if so why \n" ); document.write( "

Algebra.Com's Answer #187473 by Edwin McCravy(20055) $\"\"$ $\"About$

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(-2, 7), (-1, 5), (0, 3), (1, 1), (2, 1) is this a function and if so why
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document.write( "It is a function because all the x-coordinates (first coordinates)\r\n" );
document.write( "are different.  It means that if they were plotted on a graph no \r\n" );
document.write( "point is directly above or below any other point.\r\n" );
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document.write( "Edwin

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