SOLUTION: Find the coefficient of correlation: Given point (2,10) (5,8) (7,9) (8,1) which I already found Sx=21 Sy=50

Question 1028665: Find the coefficient of correlation: Given point (2,10) (5,8) (7,9) (8,1)
which I already found Sx=21
Sy=50
S(xy)= -2.3
My question is how do I find the regression line with the above data. What is the predicted value of Y if x=3?
I did b1=SS(xy)/SS(x)=-2.3/21=0.109 rounded to 0.11
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
7.60-0.11(3)=27.27....(3 for given x)
I'm not sure if I did this problem correct. Please help

Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
Find the coefficient of correlation: Given point (2,10) (5,8) (7,9) (8,1)
I used my TI-84+ to get::
r = -0.710
----
Least Squares Equation::
y = -1.1x + 13
==============
Cheers,
Stan H.
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