document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1019812>Question 1019812</A>: <I><SPAN STYLE=\"word-break: break-all;\">  Write the equation of the parabola with vertex at the origin and <BR>\n" );
document.write( "directrix is at y+4=0\r<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 #635741 by </B><A HREF=/tutors/aboutme.mpl?userid=josgarithmetic><B>josgarithmetic(39617)</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=635741\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find the focus using knowledge of parabolas and then learn what to do with this video lesson/demonstration:\r<BR>\n" );
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document.write( "<a  rel=nofollow HREF=\"https://www.youtube.com/watch?v=M8LGsQMwwj4\">Deriving equation of a parabola, vertex at Origin</a> </SPAN>\n" );
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