document.write( "Question 189565: which of these equations is y a function of x?
\n" ); document.write( "y=3xcubed, xy=1, ysquared=x, ycubed=8x
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Algebra.Com's Answer #142238 by user_dude2008(1862)\"\" \"About 
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y=3xcubed ----> yes
\n" ); document.write( "xy=1 => y=1/x ----> yes
\n" ); document.write( "ysquared=x => y = sqrt(x) or y=-sqrt(x) ----> no
\n" ); document.write( "ycubed=8x => y = cuberoot(8x) ---> yes
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