document.write( "Question 1173977: does the following rule defines y as a function of x or no\r
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Algebra.Com's Answer #799319 by ikleyn(52779)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "No,\r
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\n" ); document.write( "\n" ); document.write( "BECAUSE  for every given value of  x  it defines  TWO  values of  y,\r
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\n" ); document.write( "\n" ); document.write( "while a  TRUE function  MUST  DEFINE  a  unique value of y.\r
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