A) Find Correlation Coefficient to the Set of Data $\{ ( 1,3 ) , ( - 2,9 ) , ( 2,1 ) \}$

a) Find correlation coefficient to the set of data. Round the answer to 4 decimal places if necessary.
$\{ ( 1,3 ) , ( - 2,9 ) , ( 2,1 ) \}$
r = __________

b) Find correlation coefficient to the set of data. Round the answer to 4 decimal places if necessary.
$\{ ( 0,1 ) , ( 1,0 ) , ( 2,1 ) \}$
r = __________

c) Find correlation coefficient to the set of data. Round the answer to 4 decimal places if necessary.
$\{ ( 0,0 ) , ( 5 , - 5 ) , ( 2 , - 1.7 ) \}$
r = __________

Use correlation coefficients to determine which of the given sets of data is best fit by its associated regression line.

__________

Use correlation coefficients to determine which of the given sets of data is worst fit by its associated regression line .

Is it a perfect fit for any of the data sets