document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=647240>Question 647240</A>: <I><SPAN STYLE=\"word-break: break-all;\"> find the focus and directrix<BR>\n" );
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document.write( "9x^2=4y </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #406050 by </B><A HREF=/tutors/aboutme.mpl?userid=aaronwiz><B>aaronwiz(69)</B></A><img src=\"/images/stars/stars-08.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=aaronwiz><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=406050\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Hi, my name is Aaron I am in 10th grade and im in honors trig/pre-calc.\r<BR>\n" );
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document.write( "I do not feel like showing all the work, because I have lots of HW to do. However I will guide you, and provide an answer.\r<BR>\n" );
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document.write( "First put it in the correct form,  (x-h)^2=4p(y-k) we know the vertex is at (0,0) so \r<BR>\n" );
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document.write( "it turns out being already in the correct form. \r<BR>\n" );
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document.write( "As you can see the coef. of y represents the \"4p.\" Thus 4=4p\r<BR>\n" );
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document.write( "Since the graph opens up, and p=1, we know the focus is one unit above the vertex (0,1)\r<BR>\n" );
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document.write( "Also since p=1 we know the directrix is one unit below the vertex, y=-1 is the equation for it.\r<BR>\n" );
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document.write( "hope I helped<BR>\n" );
document.write( "-Aaron </SPAN>\n" );
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