document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=139161>Question 139161</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Please help! Given the Vertex, Axis of Sym., and y-intercept what is the equation?  Thanks!\r<BR>\n" );
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document.write( "vertex (4,11)\r<BR>\n" );
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document.write( "A of S = x=4\r<BR>\n" );
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document.write( "y-intercept (0,3)\r<BR>\n" );
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document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #101482 by </B><A HREF=/tutors/aboutme.mpl?userid=scott8148><B>scott8148(6628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=scott8148><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=scott8148><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=101482\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> the vertex form of a parabolic (quadratic) equation is y-k=a(x-h)^2<BR>\n" );
document.write( "__ vertex is (h,k) and a is a measure of the width of the opening of the parabola\r<BR>\n" );
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document.write( "using the vertex __ y-11=a(x-4)^2\r<BR>\n" );
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document.write( "substituting the y-intercept __ 3-11=a(0-4)^2 __ -8=a(16) __ -1/2=a\r<BR>\n" );
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document.write( "y-11=(-1/2)(x-4)^2 </SPAN>\n" );
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