document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=654800>Question 654800</A>: <I><SPAN STYLE=\"word-break: break-all;\"> (y-4)^2=16(x+1)which conic section does the equation describe? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #409791 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=409791\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> (y-4)^2=16(x+1)which conic section does the equation describe?<BR>\n" );
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document.write( "This is a parabola that opens rightwards:<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: (4,-1)<BR>\n" );
document.write( "axis of symmetry: y=4<BR>\n" );
document.write( "4p=16<BR>\n" );
document.write( "p=4 (distance from vertex to focus and directrix on the axis of symmetry)<BR>\n" );
document.write( "see graph below:<BR>\n" );
document.write( "y=4±4(x+1)^.5<BR>\n" );
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