document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=840671>Question 840671</A>: <I><SPAN STYLE=\"word-break: break-all;\"> If the vertex is at the Origin write the equation of the parabola and identify the<BR>\n" );
document.write( "	directrix				<BR>\n" );
document.write( "4.	Focus at (0, 1)			<BR>\n" );
document.write( "5.	Focus at (0, 5)			\r<BR>\n" );
document.write( "\n" );
document.write( "focus<BR>\n" );
document.write( "6.	directrix y = 7<BR>\n" );
document.write( "7.	directrix y = -3\r<BR>\n" );
document.write( "\n" );
document.write( "I am so lost it is unreal....  How do I do this?  I have spent 3 hours looking for an example at the least with nothing found... </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #506405 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=506405\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> If the vertex is at the Origin write the equation of the parabola and identify the directrix<BR>\n" );
document.write( "4. Focus at (0, 1)<BR>\n" );
document.write( "parabola opens upward:<BR>\n" );
document.write( "axis of symmetry:x=0 or y-axis<BR>\n" );
document.write( "basic form of equation: x^2=4py<BR>\n" );
document.write( "p=1(distance from vertex to given focus on the axis of symmetry)<BR>\n" );
document.write( "4p=4<BR>\n" );
document.write( "equation; x^2=4y<BR>\n" );
document.write( "directrix: y=-1(p-distance from vertex to directrix on the axis of symmetry)<BR>\n" );
document.write( "..<BR>\n" );
document.write( "5. Focus at (0, 5)<BR>\n" );
document.write( "parabola opens upward:<BR>\n" );
document.write( "axis of symmetry:x=0 or y-axis<BR>\n" );
document.write( "basic form of equation: x^2=4py<BR>\n" );
document.write( "p=5(distance from vertex to given focus on the axis of symmetry)<BR>\n" );
document.write( "4p=20<BR>\n" );
document.write( "equation; x^2=20y<BR>\n" );
document.write( "directrix: y=-5(p-distance from vertex to directrix on the axis of symmetry)<BR>\n" );
document.write( "..<BR>\n" );
document.write( "6. directrix y = 7<BR>\n" );
document.write( "parabola opens downward:<BR>\n" );
document.write( "axis of symmetry:x=0 or y-axis<BR>\n" );
document.write( "basic form of equation: x^2=-4py<BR>\n" );
document.write( "p=7(distance from vertex to given directrix on the axis of symmetry)<BR>\n" );
document.write( "4p=28<BR>\n" );
document.write( "equation; x^2=-28y<BR>\n" );
document.write( "focus: y=(0,-7)(p-distance from vertex to focus on the axis of symmetry)<BR>\n" );
document.write( "..<BR>\n" );
document.write( "7. directrix y = -3 <BR>\n" );
document.write( "parabola opens upward:<BR>\n" );
document.write( "axis of symmetry:x=0 or y-axis<BR>\n" );
document.write( "basic form of equation: x^2=4py<BR>\n" );
document.write( "p=3(distance from vertex to given directrix on the axis of symmetry)<BR>\n" );
document.write( "4p=12<BR>\n" );
document.write( "equation; x^2=12y<BR>\n" );
document.write( "focus: y=(0,-3)(p-distance from vertex to focus on the axis of symmetry) </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );