document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=113989>Question 113989</A>: <I><SPAN STYLE=\"word-break: break-all;\"> y^2=-4x<BR>\n" );
document.write( "For the above, find the following:<BR>\n" );
document.write( "1.  Find the vertex<BR>\n" );
document.write( "2.  Find the focus<BR>\n" );
document.write( "3.  Find the directrix. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #83773 by </B><A HREF=/tutors/aboutme.mpl?userid=solver91311><B>solver91311(24713)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=solver91311><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=solver91311><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=83773\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y%5E2=-4x ALIGN=MIDDLE  ALT=\"y%5E2=-4x\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "Convert this to the standard equation for a parabola  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28y-k%29%5E2=4p%28x-h%29 ALIGN=MIDDLE  ALT=\"%28y-k%29%5E2=4p%28x-h%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > that has a vertex at (h,k), focus at (h+p,k), and directrix at x = -p\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=%28y-0%29%5E2=4%28-1%29%28x-0%29 ALIGN=MIDDLE  ALT=\"%28y-0%29%5E2=4%28-1%29%28x-0%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
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document.write( "So, k = 0, h = 0, and p = -1\r<BR>\n" );
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document.write( "1.  Vertex:  (0, 0)<BR>\n" );
document.write( "2.  Focus:   (-1,0)<BR>\n" );
document.write( "3.  Directrix: x=1\r<BR>\n" );
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document.write( " </SPAN>\n" );
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