document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=580630>Question 580630</A>: <I><SPAN STYLE=\"word-break: break-all;\"> the vertex of this parabola is at (2,-1). when the y-value is 0, the x-value is 5. What is the coefficient of the squared term in the parabola's equation? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #371309 by </B><A HREF=/tutors/aboutme.mpl?userid=dfrazzetto><B>dfrazzetto(283)</B></A><img src=\"/images/stars/stars-09.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=dfrazzetto><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/cgi-bin/show-face.mpl?user=dfrazzetto><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=371309\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Vertex form:\r<BR>\n" );
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document.write( "y = a(x-2)^2 -1\r<BR>\n" );
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document.write( "solve for a:\r<BR>\n" );
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document.write( "0 = a(5-2)^2 -1\r<BR>\n" );
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document.write( "1 = a(3)^2\r<BR>\n" );
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document.write( "1 = 9a\r<BR>\n" );
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document.write( "a = 1/9 </SPAN>\n" );
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