document.write( "Question 634824: Determine whether the equation defines y as a function of x.\r
\n" ); document.write( "\n" ); document.write( "x2 + y2 = 1
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Algebra.Com's Answer #399965 by jim_thompson5910(35256) $\"\"$ $\"About$

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Solve for y to get \r
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\n" ); document.write( "\n" ); document.write( "Because we got that \"plus/minus\", this means that each input produces 2 outputs...which means that y is NOT a function of x.\r
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