document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=867544>Question 867544</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Find an equation of a parabola with<BR>\n" );
document.write( "a) focus(0,-7) and directrix x = 7 <BR>\n" );
document.write( "b) focus(5,0) and directrix x = -5\r<BR>\n" );
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document.write( "Thanks so much in advance:)  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #523132 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=523132\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Find an equation of a parabola with<BR>\n" );
document.write( "a) focus(0,-7) and directrix: x=7<BR>\n" );
document.write( "This is an equation of a parabola that opens left with vertex at origin.<BR>\n" );
document.write( "Its basic form of equation: y^2=-4px<BR>\n" );
document.write( "For given parabola:<BR>\n" );
document.write( "vertex:(0,0)<BR>\n" );
document.write( "axis of symmetry: y=0 <BR>\n" );
document.write( "p=7 (distance from vertex to directrix and focus on the axis of symmetry)<BR>\n" );
document.write( "4p=28<BR>\n" );
document.write( "equation: y^2=-28x<BR>\n" );
document.write( "... <BR>\n" );
document.write( "b) focus(5,0) and directrix x = -5<BR>\n" );
document.write( "This is an equation of a parabola that opens right with vertex at origin.<BR>\n" );
document.write( "Its basic form of equation: y^2=4px<BR>\n" );
document.write( "For given parabola:<BR>\n" );
document.write( "vertex:(0,0)<BR>\n" );
document.write( "axis of symmetry: y=0 <BR>\n" );
document.write( "p=5 (distance from vertex to directrix and focus on the axis of symmetry)<BR>\n" );
document.write( "4p=20<BR>\n" );
document.write( "equation: y^2=20x </SPAN>\n" );
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