document.write( "Question 1103781: Which one of the following is a function?\r
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\n" ); document.write( " 3x – y = 9
\n" ); document.write( " 3x^2 – y^2 = 9 \n" ); document.write( "

Algebra.Com's Answer #718483 by Edwin McCravy(20055) $\"\"$ $\"About$

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document.write( "is not a function because (6,-3) and (6,3) both satisfy\r\n" );
document.write( " and a function cannot have two different\r\n" );
document.write( "y-values for the same x-value.\r\n" );
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document.write( "Also\r\n" );
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document.write( "Thus for each value of x, there is only one value of y,\r\n" );
document.write( "since 3x-9 has but one value.\r\n" );
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document.write( "Therefore this is a function\r\n" );
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document.write( "----\r\n" );
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document.write( "is not a function because (√6,-3) and (√6,3) both satisfy\r\n" );
document.write( " and a function cannot have two different\r\n" );
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document.write( "Edwin

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