document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=925550>Question 925550</A>: <I><SPAN STYLE=\"word-break: break-all;\"> a parabola has a vertex v=(6, 4) and a focus f=(6, -1). Enter the equation in the form: (x-h)^2=4p(y-k) or (y-k)^2=4p(x-h) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #561595 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39618)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><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=561595\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You are given enough information to find the directrix.  Use the distance formula and definition of a parabola to derive the equation for the specific parabola of your example; and adjust the form of the equation to whichever format you want.\r<BR>\n" );
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document.write( "The directrix is on the other side of the vertex than the focus.  The directrix is y=9, so the general point for the directrix would be (x,9).\r<BR>\n" );
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document.write( "Work with this:<BR>\n" );
document.write( "Focus to parabola equals directrix to parabola.<BR>\n" );
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