document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=668846>Question 668846</A>: <I><SPAN STYLE=\"word-break: break-all;\"> Why is it necessary to choose three points on a graph (when graphing a quadratic equation)?  </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #415896 by </B><A HREF=/tutors/aboutme.mpl?userid=lwsshak3><B>lwsshak3(11628)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=lwsshak3><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=415896\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> Why is it necessary to choose three points on a graph (when graphing a quadratic equation)?\r<BR>\n" );
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document.write( "Here is one way to look at it:<BR>\n" );
document.write( "The general form of a quadratic equation is:<BR>\n" );
document.write( "y=Ax^2+Bx+C<BR>\n" );
document.write( "notice there are 3 unknowns to solve, A, B and C<BR>\n" );
document.write( "thus, you will need 3 points for a system of 3 simultaneous equations </SPAN>\n" );
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