document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=183120>Question 183120</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Is x=y^4+5 a function? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #137508 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/images/nopicture.jpg><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=137508\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Is x=y^4+5 a function?<BR>\n" );
document.write( "--------<BR>\n" );
document.write( "Solve for \"y\":<BR>\n" );
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document.write( "y = (x-5)^(1/4)\r<BR>\n" );
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document.write( "-----------------<BR>\n" );
document.write( "Example: If you let x = 21 you get<BR>\n" );
document.write( "y = (21-5)^(1/4)<BR>\n" );
document.write( "y = 16^(1/4)<BR>\n" );
document.write( "y = 2 or y = -2<BR>\n" );
document.write( "---------------------<BR>\n" );
document.write( "Since there are two y-values for a single value of \"x\"<BR>\n" );
document.write( "x = y^4+5 is not a function.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );