document.write( "Question 322483: you are given the following data\r
\n" ); document.write( "\n" ); document.write( "number of absences
\n" ); document.write( " 0
\n" ); document.write( " 1
\n" ); document.write( " 2
\n" ); document.write( " 2
\n" ); document.write( " 3
\n" ); document.write( " 3
\n" ); document.write( " 4
\n" ); document.write( " 5
\n" ); document.write( " 6 \r
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\n" ); document.write( "\n" ); document.write( "final grade
\n" ); document.write( " 96
\n" ); document.write( " 92
\n" ); document.write( " 71
\n" ); document.write( " 71
\n" ); document.write( " 78
\n" ); document.write( " 66
\n" ); document.write( " 60
\n" ); document.write( " 51
\n" ); document.write( " 42\r
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\n" ); document.write( "\n" ); document.write( "make a scatter plot for the data;
\n" ); document.write( "find the correlation coefficient for the data
\n" ); document.write( "find the equation for the regression line for the data, and predict the final grade of the student who misses 3.5 days \n" ); document.write( "
Algebra.Com's Answer #230877 by Edwin McCravy(20056)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "On your TI-83 or TI-84\r\n" );
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document.write( "Press ON\r\n" );
document.write( "Press CLEAR\r\n" );
document.write( "Press 2ND\r\n" );
document.write( "Press 0  (zero)\r\n" );
document.write( "Press x-1\r\n" );
document.write( "Press down arrow 9 times to scroll to DiagnosticOn\r\n" );
document.write( "Press ENTER  (read DiagnosticOn\r\n" );
document.write( "Press ENTER  (read Done\r\n" );
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document.write( "Press CLEAR\r\n" );
document.write( "Press STAT\r\n" );
document.write( "Press 1\r\n" );
document.write( "(enter the data for the number of absences in L1\r\n" );
document.write( "(enter the data for the final grades in L2\r\n" );
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document.write( "Press 2ND\r\n" );
document.write( "Press Y=\r\n" );
document.write( "Press ENTER\r\n" );
document.write( "Press ENTER (again)\r\n" );
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document.write( "Press STAT\r\n" );
document.write( "Press right arrow >\r\n" );
document.write( "Press 4    \r\n" );
document.write( "(you'll see LinRed(ax+b)\r\n" );
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document.write( "Press VARS\r\n" );
document.write( "Press right arrow >\r\n" );
document.write( "Press ENTER\r\n" );
document.write( "Press ENTER again\r\n" );
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document.write( "See this:\r\n" );
document.write( "LinReg\r\n" );
document.write( " y=ax+b\r\n" );
document.write( " a=-8.873076923\r\n" );
document.write( " b=95.3\r\n" );
document.write( " rē=.9149096479\r\n" );
document.write( " r=-.9565090945 \r\n" );
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document.write( "That means the regression line is y = -8.873076923x + 95.3\r\n" );
document.write( "and the correlation coefficient is  r=.9565090945\r\n" );
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document.write( "To see the scatter plot and the regression line:\r\n" );
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document.write( "Press ZOOM\r\n" );
document.write( "Press 9 \r\n" );
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document.write( "Edwin

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