document.write( "Question 639432: Which of these is a symmetric function?
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Algebra.Com's Answer #402731 by Edwin McCravy(20055) $\"\"$ $\"About$

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A) f(x)=x²
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document.write( "In each case replace f(x) by y\r\n" );
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document.write( "A)  y = x²\r\n" );
document.write( "B)  y = x³\r\n" );
document.write( "C)  y = x\r\n" );
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document.write( "Interchange the variables x and y\r\n" );
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document.write( "A)  x = y²\r\n" );
document.write( "B)  x = y³\r\n" );
document.write( "C)  x = y\r\n" );
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document.write( "For each, ask the question \"Is this equivalent to what it was before the variables were interchanged?\r\n" );
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document.write( "A)  Is x = y² equivalent to y = x²?  Answer: NO\r\n" );
document.write( "B)  Is x = y³ equivalent to y = x³?  Answer: NO\r\n" );
document.write( "C)  Is x = y  equivalent to y = x ?  Answer: YES\r\n" );
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document.write( "So the answer is C)  f(x)=x\r\n" );
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document.write( "Edwin

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