document.write( "Question 237695: A)find the quadratic function that models data as a function of x, the number of weeks.\r
\n" ); document.write( "\n" ); document.write( "weeks- 0,1,2,3,4,5,6
\n" ); document.write( " #- 585,582,629,726,873,1070,1317\r
\n" ); document.write( "\n" ); document.write( "B) use the model to estimate the number at 8 weeks\r
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Algebra.Com's Answer #174783 by Edwin McCravy(20054) $\"\"$ $\"About$

You can put this solution on YOUR website!
A)find the quadratic function that models data as a function of x, the number of weeks.\r
\n" ); document.write( "\n" ); document.write( "weeks- 0,1,2,3,4,5,6
\n" ); document.write( " #- 585,582,629,726,873,1070,1317
\n" ); document.write( "

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document.write( "On your TI-83 or TI-84,\r\n" );
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document.write( "Press CLEAR\r\n" );
document.write( "Press STAT\r\n" );
document.write( "Press 1\r\n" );
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document.write( " Put in the values 0,1,2, thru 6, in L1\r\n" );
document.write( " Put in the values 585,582, thru 1317, in L2\r\n" );
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document.write( "Press STAT \r\n" );
document.write( "Press the right arrow key\r\n" );
document.write( "Press 5\r\n" );
document.write( "Press ENTER\r\n" );
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document.write( "You will read:\r\n" );
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document.write( "y=ax²+bx+c\r\n" );
document.write( "a=25\r\n" );
document.write( "b=-28\r\n" );
document.write( "c=585\r\n" );
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document.write( "So quadratic equation (model) is\r\n" );
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document.write( "y = f(x) = 25x² - 28x + 585\r\n" );
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document.write( "B) use the model to estimate the number at 8 weeks\r\n" );
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document.write( "y = f(8) = 25(8)² - 28(8) + 585 = 1961\r\n" );
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document.write( "If you aren't allowed to use a calculator, post again,\r\n" );
document.write( "stating so.\r\n" );
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document.write( "Edwin

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