document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=48215>Question 48215</A>: <I><SPAN STYLE=\"word-break: break-all;\"> When you graph a quadratic function and find the vertex is on the Y-axis, you know for sure that?<BR>\n" );
document.write( "I think that we know for sure that the coefficient of the x term (\"b\") is zero; OR<BR>\n" );
document.write( "The roots of the equation is the positive and negative of the same number (+p and -p). </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #31897 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=31897\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Well, the answer is one or both of the above.<BR>\n" );
document.write( "If the vertex of the parabola is on the y-axis, then, if the parabola intersects the x-axis, it does so at +x and -x and the coefficient of x (b) is 0.\r<BR>\n" );
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document.write( "If the parabola doesn't inersect the x-axis, but the vertex is on the y-axis, then the coefficient of x (b) is 0.\r<BR>\n" );
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document.write( "See the graphs below of <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+x%5E2-2 ALIGN=MIDDLE  ALT=\"y+=+x%5E2-2\"   DISABLED_style= \"max-width:90%; height:auto;\" > (red) and <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=y+=+x%5E2%2B2 ALIGN=MIDDLE  ALT=\"y+=+x%5E2%2B2\"   DISABLED_style= \"max-width:90%; height:auto;\" > (green):<BR>\n" );
document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=graph%28300%2C200%2C-5%2C5%2C-10%2C10%2Cx%5E2-2%2Cx%5E2%2B2%29 ALIGN=MIDDLE  ALT=\"graph%28300%2C200%2C-5%2C5%2C-10%2C10%2Cx%5E2-2%2Cx%5E2%2B2%29\"   DISABLED_style= \"max-width:90%; height:auto;\" ><BR>\n" );
document.write( " </SPAN>\n" );
document.write( "</TD></TR></TABLE>\n" );