document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=588579>Question 588579</A>: <I><SPAN STYLE=\"word-break: break-all;\"> 9x2 +14y = 0<BR>\n" );
document.write( " Find focus, directrix, and focal diameter </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #374544 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=374544\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> 9x2 +14y = 0<BR>\n" );
document.write( "Find focus, directrix, and focal diameter.<BR>\n" );
document.write( "**<BR>\n" );
document.write( "Standard form of equation for a parabola that opens downwards: (x-h)^2=-4p(y-k), (h,k) being the (x,y) coordinates of the vertex.<BR>\n" );
document.write( "For given equation: 9x^2+14y=0<BR>\n" );
document.write( "9x^2=-14y<BR>\n" );
document.write( "x^2=(-14/9)y<BR>\n" );
document.write( "vertex: (0,0)<BR>\n" );
document.write( "axis of symmetry: y-axis or x=0<BR>\n" );
document.write( "4p=14/9<BR>\n" );
document.write( "p=14/36=7/18<BR>\n" );
document.write( "focus: (0,0-p)=(0,-7/18)<BR>\n" );
document.write( "directrix: y=7/18<BR>\n" );
document.write( "focal diameter also known as focal width=4p=14/9<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );