document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=189883>Question 189883</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Tell whether the graph opens up or down write an equation of the axis of symmetry<BR>\n" );
document.write( "y=4x^2-4 </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #142486 by </B><A HREF=/tutors/aboutme.mpl?userid=nerdybill><B>nerdybill(7384)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=nerdybill><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=nerdybill><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=142486\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Everything you need to know can be found at:<BR>\n" );
document.write( "http://www.mathwarehouse.com/geometry/parabola/standard-and-vertex-form.php<BR>\n" );
document.write( ".<BR>\n" );
document.write( "y=4x^2-4<BR>\n" );
document.write( "To tell whether it opens up or down -- look at the coefficient associated with the x^2 term: +4 -- since it is POSITIVE -- think smiley face -- U -- it opens UPWARDS.<BR>\n" );
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document.write( "The axis of symmetry is at:<BR>\n" );
document.write( "x = -b/2a<BR>\n" );
document.write( "x = -0/2(4)<BR>\n" );
document.write( "x = -0/8<BR>\n" );
document.write( "x = 0\r<BR>\n" );
document.write( "<BR>\n" );
document.write( "\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );