document.write( "Question 1028665: Find the coefficient of correlation: Given point (2,10) (5,8) (7,9) (8,1)
\n" ); document.write( "which I already found Sx=21
\n" ); document.write( " Sy=50
\n" ); document.write( " S(xy)= -2.3\r
\n" ); document.write( "\n" ); document.write( "My question is how do I find the regression line with the above data. What is the predicted value of Y if x=3?\r
\n" ); document.write( "\n" ); document.write( "I did b1=SS(xy)/SS(x)=-2.3/21=0.109 rounded to 0.11
\n" ); document.write( " b0= y-(b1*x)=y[(-)over the y]-(b1*x [(-) over the x]=28-(-0.109*22)/4=30.398/4=7.599 rounded to 7.50\r
\n" ); document.write( "\n" ); document.write( "7.60-0.11(3)=27.27....(3 for given x)
\n" ); document.write( "I'm not sure if I did this problem correct. Please help
\n" ); document.write( "
\n" ); document.write( " \n" ); document.write( "
Algebra.Com's Answer #643750 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
Find the coefficient of correlation: Given point (2,10) (5,8) (7,9) (8,1)
\n" ); document.write( "I used my TI-84+ to get::
\n" ); document.write( "r = -0.710
\n" ); document.write( "----
\n" ); document.write( "Least Squares Equation::
\n" ); document.write( "y = -1.1x + 13
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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