document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=201741>Question 201741</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the vertex, focus, and directrix of the parabola given by the equation (x-9)^2=-(y+8)? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #151994 by </B><A HREF=/tutors/aboutme.mpl?userid=RAY100><B>RAY100(1637)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=RAY100><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=151994\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (x-9)^2 = - (y+8)<BR>\n" );
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document.write( "(y+8)= -1 (x-9)^2,,,,,form  (y-k) =A (x-h)^2<BR>\n" );
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document.write( "h=9,,k=-8,,,,or  vertex  (9,-8)<BR>\n" );
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document.write( "A= -1,,,therefore  pointed  down<BR>\n" );
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document.write( "basic  form 4p = A,,4p =1,  p=1/4<BR>\n" );
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document.write( "focus  is  at  (-8 -1/4) = -8.25,,,,or  (9,-8.25)<BR>\n" );
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document.write( "diectrix  is  at  y= ( -8 +1/4),,,y = - 7.75  </SPAN>\n" );
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