document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=89183>Question 89183</A>: <I><SPAN STYLE=\"word-break: break-all;\"> How can you tell from the equation of a parabola whether the graph has a maximum or a minimum value at its vertex? <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 #64810 by </B><A HREF=/tutors/aboutme.mpl?userid=Earlsdon><B>Earlsdon(6294)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Earlsdon><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=64810\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> You can tell in the following way!<BR>\n" );
document.write( "The general form of the equation of a parabola is:<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=ax%5E2%2Bbx%2Bc+=+0 ALIGN=MIDDLE  ALT=\"ax%5E2%2Bbx%2Bc+=+0\"   DISABLED_style= \"max-width:90%; height:auto;\" > <BR>\n" );
document.write( "Look at the coefficient of the <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=x%5E2 ALIGN=MIDDLE  ALT=\"x%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" > term, that's the a, and...<BR>\n" );
document.write( "If a > 0 (positive), then the parabola opens upward and the graph has a minimum at its vertex.<BR>\n" );
document.write( "If a < 0 (negative), then the parabola opens downward and the graph has a maximum at its vertex. </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );