document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=144766>Question 144766</A>: <I><SPAN STYLE=\"word-break: break-all;\"> The vertex of  parabola  is at the point (-1, -3). how do i get the equation of the parabola? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #105485 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=105485\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The vertex of  parabola  is at the point (-1, -3). how do i get the equation of the parabola?<BR>\n" );
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document.write( "Form y = ax^2 + bx + c<BR>\n" );
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document.write( "The vertex occurs where x = -b/2a<BR>\n" );
document.write( "So, -b/2a = -1 ; b = 2a<BR>\n" );
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document.write( "Therefore, let a = 1,then b = 2<BR>\n" );
document.write( "y = x^2 + 2x + c<BR>\n" );
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document.write( "But y = -3 when x = -1,so:<BR>\n" );
document.write( "-3 = 1 -2 + c<BR>\n" );
document.write( "c = -2<BR>\n" );
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document.write( "EQUATION:<BR>\n" );
document.write( "y = x^2 + 2x -2 is a parabola with vertex = (-1,-3).<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H.<BR>\n" );
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document.write( "  </SPAN>\n" );
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