document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=411096>Question 411096</A>: <I><SPAN STYLE=\"word-break: break-all;\"> suppose you have the quadratic equation of \r<BR>\n" );
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document.write( "tickets=-0.2x(squared)+ 12x+11 ; x=1 day ticket sales start.\r<BR>\n" );
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document.write( "does the graph of this equation open up or down? how do you know </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #288969 by </B><A HREF=/tutors/aboutme.mpl?userid=josmiceli><B>josmiceli(19441)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=josmiceli><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=josmiceli><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=288969\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The graph opens down, in other words, <BR>\n" );
document.write( "it has a maximum, and not a minimum.<BR>\n" );
document.write( "Suppose you had <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+-x%5E2+%2B+10 ALIGN=MIDDLE  ALT=\"y+=+-x%5E2+%2B+10\"   DISABLED_style= \"max-width:90%; height:auto;\" >,<BR>\n" );
document.write( "The peak is at <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+10 ALIGN=MIDDLE  ALT=\"y+=+10\"   DISABLED_style= \"max-width:90%; height:auto;\" >, and any value (+ or -)<BR>\n" );
document.write( "of <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x ALIGN=MIDDLE  ALT=\"x\"   DISABLED_style= \"max-width:90%; height:auto;\" > other than <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=0 ALIGN=MIDDLE  ALT=\"0\"   DISABLED_style= \"max-width:90%; height:auto;\" > will make <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y ALIGN=MIDDLE  ALT=\"y\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( "less than the peak. </SPAN>\n" );
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