document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=913811>Question 913811</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Can someone tell me what I'm supposed to do? I don't get it. I'm supposed to find the focus and directrix. <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=x%5E2%2F16 ALIGN=MIDDLE  ALT=\"y=x%5E2%2F16\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y-5=%281%2F4%29%28x%2B3%29%5E2 ALIGN=MIDDLE  ALT=\"y-5=%281%2F4%29%28x%2B3%29%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "I have all of these formulas but I have no clue where to put what. It's starting to irritate me. A lot. </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #554748 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=554748\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> find the focus and directrix. <BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=x%5E2%2F16 ALIGN=MIDDLE  ALT=\"y=x%5E2%2F16\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y-5=%281%2F4%29%28x%2B3%29%5E2 ALIGN=MIDDLE  ALT=\"y-5=%281%2F4%29%28x%2B3%29%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "***<BR>\n" );
document.write( "Basic form of equation for a parabola that applies here:<BR>\n" );
document.write( "(x-h)^2=4p(y-k), (h,k)=coordinates of the vertex, p=distance from vertex to focus and to directrix on the axis of symmetry<BR>\n" );
document.write( "..<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=x%5E2%2F16 ALIGN=MIDDLE  ALT=\"y=x%5E2%2F16\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "x^2=16y<BR>\n" );
document.write( "This is a parabola that opens up with vertex at the origin<BR>\n" );
document.write( "axis of symmetry: x=0 or y-axis<BR>\n" );
document.write( "4p=16<BR>\n" );
document.write( "p=4<BR>\n" );
document.write( "focus:(0,4)<BR>\n" );
document.write( "directrix: y=-4<BR>\n" );
document.write( "..<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y-5=%281%2F4%29%28x%2B3%29%5E2 ALIGN=MIDDLE  ALT=\"y-5=%281%2F4%29%28x%2B3%29%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "(x+3)^2=4(y-5)<BR>\n" );
document.write( "This is a parabola that opens up with vertex at (-3,5)<BR>\n" );
document.write( "axis of symmetry: x=-3<BR>\n" );
document.write( "4p=4<BR>\n" );
document.write( "p=1<BR>\n" );
document.write( "focus:(-3,6)<BR>\n" );
document.write( "directrix: y=4 </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );