document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=449573>Question 449573</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the equation of the parabola with its vertex at the origin if its directrix is y=3 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #309310 by </B><A HREF=/tutors/aboutme.mpl?userid=Gogonati><B>Gogonati(855)</B></A><img src=\"/images/stars/stars-11.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Gogonati><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=Gogonati><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=309310\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> As you know the directrix of the parabola <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2=4cy ALIGN=MIDDLE  ALT=\"x%5E2=4cy\"   DISABLED_style= \"max-width:90%; height:auto;\" > is y=-c, since y=3, we get\r<BR>\n" );
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document.write( "3=-c or c=-3, and the equation of parabola will be: <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2=-12y ALIGN=MIDDLE  ALT=\"x%5E2=-12y\"   DISABLED_style= \"max-width:90%; height:auto;\" >.\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28300%2C+300%2C+-5%2C+5%2C+-5%2C+5%2C+%28-1%2F12%29%2Ax%5E2%29 ALIGN=MIDDLE  ALT=\"graph%28300%2C+300%2C+-5%2C+5%2C+-5%2C+5%2C+%28-1%2F12%29%2Ax%5E2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >. </SPAN>\n" );
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