document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=612351>Question 612351</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find the standard form of a parabola with vertex (0,0) and directrix x=7 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #385363 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=385363\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find the standard form of a parabola with vertex (0,0) and directrix x=7<BR>\n" );
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document.write( "This is a parabola that opens leftwards.<BR>\n" );
document.write( "Its standard form of equation: (y-k)^2=-4p(x-h), (h,k)=(x,y) coordinates of the vertex<BR>\n" );
document.write( "For given parabola:<BR>\n" );
document.write( "vertex (0,0) (given)<BR>\n" );
document.write( "axis of symmetry: x-axis or y=0<BR>\n" );
document.write( "p=7 (distance from directrix to vertex on the axis of symmetry.<BR>\n" );
document.write( "4p=28<BR>\n" );
document.write( "Equation: y^2=-28x </SPAN>\n" );
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