document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=877099>Question 877099</A>: <I><SPAN STYLE=\"word-break: break-all;\"> write an equation for the parabola with focus (0,0) and directrix y=6 <BR>\n" );
document.write( "please help </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #529229 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=529229\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> write an equation for the parabola with focus (0,0) and directrix y=6 <BR>\n" );
document.write( "given data shows parabola opens downward:<BR>\n" );
document.write( "Its basic form of equation: (x-h)^2=-4p(y-k), (h,k) =coordinates of the vertex<BR>\n" );
document.write( "For given parabola:<BR>\n" );
document.write( "axis of symmetry: x=0<BR>\n" );
document.write( "x-coordinate of vertex=0<BR>\n" );
document.write( "y-coordinate of vertex=3 (half the distance between focus and directrix on the axis of symmetry)<BR>\n" );
document.write( "vertex:(0,3)<BR>\n" );
document.write( "p=3 (distance from vertex to focus or directrix on the axis of symmetry<BR>\n" );
document.write( "4p=12<BR>\n" );
document.write( "equation of given parabola: x^2=-12(y-3) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );