document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=455843>Question 455843</A>: <I><SPAN STYLE=\"word-break: break-all;\"> i need help with this \r<BR>\n" );
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document.write( "write the standard form of the equation of the parable with its vertex at (0,0) and focus at (-2,0) </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #313228 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=313228\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> write the standard form of the equation of the parabola with its vertex at (0,0) and focus at (-2,0)<BR>\n" );
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document.write( "From given info, it can be seen that this is a parabola with a horizontal axis of symmetry, y=0 or x-axis, and it opens leftward. You can tell it has a horizontal axis of symmetry because the y-coordinates of the focus and vertex are the same.  It opens leftward because the focus is to the left of the vertex. Because it opens leftwards, the function has a negative sign.<BR>\n" );
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document.write( "Standard form of given parabola: <BR>\n" );
document.write( "(y-k)^2=-4p(x-h)<BR>\n" );
document.write( "(y-0)^2=-4p(x-0)<BR>\n" );
document.write( "y^2=-4px<BR>\n" );
document.write( "p=distance between vertex and focus on the axis of symmetry=2<BR>\n" );
document.write( "4p=8<BR>\n" );
document.write( "Equation: y^2=-8x<BR>\n" );
document.write( "See the graph below as a visual check on the answer.<BR>\n" );
document.write( "y=(-8x)^.5<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=+graph%28+300%2C+300%2C+-10%2C+10%2C+-10%2C+10%2C%28-8x%29%5E.5%2C-%28-8x%29%5E.5%29+ ALIGN=MIDDLE  ALT=\"+graph%28+300%2C+300%2C+-10%2C+10%2C+-10%2C+10%2C%28-8x%29%5E.5%2C-%28-8x%29%5E.5%29+\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
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