document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1060415>Question 1060415</A>: <I><SPAN STYLE=\"word-break: break-all;\"> I need your assistance to help find the quadratic function that models the data below please.\r<BR>\n" );
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document.write( "xI  -3      -2      -1    0   1     2      3        4       5           6           7           8           9<BR>\n" );
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document.write( "yI   54     26     -8     0   2   14     36     68     110       162       224      296         378\r<BR>\n" );
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document.write( "I need help with this please.  When I look at this all i'm seeing is a chart I don't know how I would work this out </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #675469 by </B><A HREF=/tutors/aboutme.mpl?userid=rothauserc><B>rothauserc(4718)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=rothauserc><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=rothauserc><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=675469\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> We know that we have an x^2 term since this is a quadratic<BR>\n" );
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document.write( "the general form is<BR>\n" );
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document.write( "ax^2 + bx +c = 0, where a, b, c are constants<BR>\n" );
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document.write( "we need just three points to find the function<BR>\n" );
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document.write( "take the first three point (-3, 54), (-2, 26), (-1, 8), then<BR>\n" );
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document.write( "f(-3) = 54<BR>\n" );
document.write( "f(-2) = 26<BR>\n" );
document.write( "f(-1) = 8<BR>\n" );
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document.write( "9a -3b +c = 54<BR>\n" );
document.write( "4a -2b +c = 26<BR>\n" );
document.write( "1a -1b +c = 8<BR>\n" );
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document.write( "we use Cramer's rule calculator to find a, b and c<BR>\n" );
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document.write( "a = 5, b = -3, c = 0<BR>\n" );
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document.write( "f(x) = 5x^2 -3x<BR>\n" );
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