document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1168875>Question 1168875</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the equation of the parabola is: directrix y-5=0, vertex (0, 0).<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #793528 by </B><A HREF=/tutors/aboutme.mpl?userid=htmentor><B>htmentor(1343)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=htmentor><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=htmentor><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=793528\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The standard form for a parabola is: (x - h)^2 = 4p (y - k),<BR>\n" );
document.write( "where the vertex is (h,k), directrix y = k - p, focus (h,k+p)<BR>\n" );
document.write( "The directrix is y = 5, thus p = -5<BR>\n" );
document.write( "Hence the equation is -20y = x^2 -> y = -x^2/20 </SPAN>\n" );
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