document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=399871>Question 399871</A>: <I><SPAN STYLE=\"word-break: break-all;\"> problem: write the eqation in standard form for each parabola.\r<BR>\n" );
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document.write( "vertex (0,0), Focus (-8,0)<BR>\n" );
document.write( "I know the proper equation. I just do not know which. the one with y= or x=. also when given the foci how do you get the directix? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #283161 by </B><A HREF=/tutors/aboutme.mpl?userid=Tatiana_Stebko><B>Tatiana_Stebko(1539)</B></A><img src=\"/images/stars/stars-12.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Tatiana_Stebko><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=Tatiana_Stebko><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=283161\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If Vertex (0;0),Focus (p;0) then the equation in  standard form for parabola is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y%5E2=4%2Ap%2Ax ALIGN=MIDDLE  ALT=\"y%5E2=4%2Ap%2Ax\"   DISABLED_style= \"max-width:90%; height:auto;\" >(directrix is line x=-p)<BR>\n" );
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document.write( "Focus (-8;0) p=-8<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y%5E2=4%2A%28-8%29%2Ax ALIGN=MIDDLE  ALT=\"y%5E2=4%2A%28-8%29%2Ax\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y%5E2=-32x ALIGN=MIDDLE  ALT=\"y%5E2=-32x\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "if you ask about directrix: if Focus (-8;0) directrix is line x=8<BR>\n" );
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document.write( "If Vertex (0;0),Focus (0;p) then the equation in  standard form for parabola is <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2=4%2Ap%2Ay ALIGN=MIDDLE  ALT=\"x%5E2=4%2Ap%2Ay\"   DISABLED_style= \"max-width:90%; height:auto;\" >(directrix is line y=-p)<BR>\n" );
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