document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1170036>Question 1170036</A>: <I><SPAN STYLE=\"word-break: break-all;\"> What is the equation written in vertex form of a parabola with a vertex of (9, -1) that passes through (7, 7)?<BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #794904 by </B><A HREF=/tutors/aboutme.mpl?userid=Boreal><B>Boreal(15235)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Boreal><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=Boreal><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=794904\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> y=a(x-h)^2+k<BR>\n" );
document.write( "=a(x-9)^2-1, change sign of x and keep sign of y<BR>\n" );
document.write( "when x=7 y=7<BR>\n" );
document.write( "so 7=a(-2)^2-1=4a-1<BR>\n" );
document.write( "so a=2<BR>\n" );
document.write( "answer is y=2(x-9)^2-1\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28300%2C300%2C-10%2C20%2C-10%2C200%2C2%28x-9%29%5E2-1%29 ALIGN=MIDDLE  ALT=\"graph%28300%2C300%2C-10%2C20%2C-10%2C200%2C2%28x-9%29%5E2-1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" >\r<BR>\n" );
document.write( "\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28300%2C300%2C3%2C12%2C-10%2C10%2C7%2C2%28x-9%29%5E2-1%29 ALIGN=MIDDLE  ALT=\"graph%28300%2C300%2C3%2C12%2C-10%2C10%2C7%2C2%28x-9%29%5E2-1%29\"   DISABLED_style= \"max-width:90%; height:auto;\" > </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );