document.write( "Question 1058762: determine whether the equation defines y as a function of x.
\n" ); document.write( "-x+y^2=2 \n" ); document.write( "

Algebra.Com's Answer #673854 by josmiceli(19441) $\"\"$ $\"About$

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This is not a function because any value
\n" ); document.write( "I choose for $\"+x+\"$ , here are 2 values
\n" ); document.write( "possible for $\"+y+\"$ , positive and negative.
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\n" ); document.write( "In order to be a function $\"+y+=+f%28x%29+\"$ , there must
\n" ); document.write( "be a unique $\"+y+\"$ for each $\"+x+\"$
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\n" ); document.write( "For instance:
\n" ); document.write( " $\"+x+=+1+\"$
\n" ); document.write( " $\"+y+=+1+\"$ and $\"+y+=+-1+\"$
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