document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=190916>Question 190916</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/1602773033/algebrahomeworkh>saxon algebra 2</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Graph, find center, vertices, co-vertices and foci.<BR>\n" );
document.write( "9x^2+4y=36<BR>\n" );
document.write( "I worked it out to:<BR>\n" );
document.write( "center(0,0)<BR>\n" );
document.write( "a=3 b=2 c=5<BR>\n" );
document.write( "vertices(0,+-3)<BR>\n" );
document.write( "co-vertices(+-2,0)<BR>\n" );
document.write( "foci(0,+-5)<BR>\n" );
document.write( "eccentricity=5/3<BR>\n" );
document.write( "Did I do this right?  When I graph it, the foci is outside the circle.  Is that right? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #143341 by </B><A HREF=/tutors/aboutme.mpl?userid=stanbon><B>stanbon(75887)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=stanbon><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=143341\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Graph, find center, vertices, co-vertices and foci.<BR>\n" );
document.write( "9x^2+4y=36<BR>\n" );
document.write( "y = (-9/4)x^2 + 9<BR>\n" );
document.write( "---------<BR>\n" );
document.write( "It's not a circle ; it's a parabola<BR>\n" );
document.write( "There is no center and no co-vertices.<BR>\n" );
document.write( "---------<BR>\n" );
document.write( "Vertex form by squaring the x-terms:\r<BR>\n" );
document.write( "\n" );
document.write( "9(x-0)^2 = -4(y-9)<BR>\n" );
document.write( "(x-0)^2 = (-4/9)(y-9)<BR>\n" );
document.write( "h = 0; k = 9<BR>\n" );
document.write( "4p = -4/9<BR>\n" );
document.write( "p = -1/9<BR>\n" );
document.write( "---------------------------<BR>\n" );
document.write( "Vertex: (0 , 9)<BR>\n" );
document.write( "Focus (0 , 80/9)<BR>\n" );
document.write( "======================<BR>\n" );
document.write( "Cheers,<BR>\n" );
document.write( "Stan H. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );