document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=913711>Question 913711</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Identify the focus point and the equation of the directrix for the parabola defined by these equations<BR>\n" );
document.write( "I hope it's okay that I stick a couple of different scenarios, please explain how the answer is obtained. I don't even particularly need the answer; I have the answer key. I just don't know how to obtain said answer.\r<BR>\n" );
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document.write( "1. <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+x%5E2 ALIGN=MIDDLE  ALT=\"y+=+x%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > 2. <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+cx%5E2 ALIGN=MIDDLE  ALT=\"y+=+cx%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > 3. <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+-+5+=+%281%2F4%29%28x+%2B+3%29%5E2 ALIGN=MIDDLE  ALT=\"y+-+5+=+%281%2F4%29%28x+%2B+3%29%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #554676 by </B><A HREF=/tutors/aboutme.mpl?userid=ewatrrr><B>ewatrrr(24785)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ewatrrr><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=ewatrrr><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=554676\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the vertex form of a Parabola opening up(a>0) or down(a<0), <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=a%28x-h%29%5E2+%2Bk ALIGN=MIDDLE  ALT=\"y=a%28x-h%29%5E2+%2Bk\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "where(h,k) is the vertex  and  x = h  is the Line of Symmetry<BR>\n" );
document.write( "p = <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=1%2F%284a%29 ALIGN=MIDDLE  ALT=\"1%2F%284a%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >, where  the focus is (h,k + p) and the Directrix y = (k - p)\r<BR>\n" );
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document.write( "1. <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+x%5E2 ALIGN=MIDDLE  ALT=\"y+=+x%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >, V(0,0)  a = 1,  p = 1/(4a) , p = 1/4, F(0,.25) directrix y = -.25 <BR>\n" );
document.write( "2. <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+cx%5E2 ALIGN=MIDDLE  ALT=\"y+=+cx%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >, V(0,0) a = c,  p = 1/(4c), F(0,1/(4c)) directrix y = -1/(4c) <BR>\n" );
document.write( "3. <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y=+%281%2F4%29%28x+%2B+3%29%5E2+%2B+5 ALIGN=MIDDLE  ALT=\"y=+%281%2F4%29%28x+%2B+3%29%5E2+%2B+5\"   DISABLED_style= \"max-width:90%; height:auto;\" >V(-3,5),a = 1/4,   p = 1/4a = 1,  F(0,6) directrix y = 4 <BR>\n" );
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