document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=258299>Question 258299</A>: <I><SPAN STYLE=\"word-break: break-all;\"> is y2=3x 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 #190147 by </B><A HREF=/tutors/aboutme.mpl?userid=Theo><B>Theo(13342)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Theo><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/cgi-bin/show-face.mpl?user=Theo><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=190147\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> y^2 = 3x is not a function.\r<BR>\n" );
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document.write( "solve for y to get:\r<BR>\n" );
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document.write( "y = +/- sqrt(3x)\r<BR>\n" );
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document.write( "for it to be a function there has to be one and only one value of y for each value of x.\r<BR>\n" );
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document.write( "if there is at least one instance where there are more than 1 value of y for each value of x, then it is a relation and not a function.\r<BR>\n" );
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document.write( "you give the graph of this equation the vertical line test.\r<BR>\n" );
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document.write( "if the vertical line cuts through more than one point on the graph of the equation, then it is not a function.\r<BR>\n" );
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document.write( "graph of this equation is shown below:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph+%28600%2C600%2C-10%2C10%2C-10%2C10%2Csqrt%283x%29%2C-sqrt%283x%29%29 ALIGN=MIDDLE  ALT=\"graph+%28600%2C600%2C-10%2C10%2C-10%2C10%2Csqrt%283x%29%2C-sqrt%283x%29%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "on this graph, you can see that a vertical line passing through the graph of the equation will cut through the equation twice for each value of x at all points except at the vertex.\r<BR>\n" );
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document.write( " </SPAN>\n" );
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