document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=297681>Question 297681</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In which direction does the parabola for the quadratic equation y = -x2 + 12x + 15 open? </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #214328 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=214328\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> In which direction does the parabola for the quadratic equation <BR>\n" );
document.write( "y = -x^2 + 12x + 15 open?<BR>\n" );
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document.write( "Do you see that as x gets larger and larger the -x^2 term<BR>\n" );
document.write( "has the greatest effect on the value of \"y\"?<BR>\n" );
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document.write( "So, as x gets approaches +inf, -x^2 gets more and more negative.<BR>\n" );
document.write( "And, as gets approaches -inf, -x^2 gets more and more negative.<BR>\n" );
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document.write( "Since both tails of the parabola get more and more negative,<BR>\n" );
document.write( "the parabola opens downward.<BR>\n" );
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document.write( "Cheers,<BR>\n" );
document.write( "Stan H. <BR>\n" );
document.write( " </SPAN>\n" );
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