:6. Consider the following data <p>

x y
 
 4 4
 4    2
 3 1
 3 5
 1 5
 3 7 <p>

The correlation coefficient is closest to
 
 a.  -0.33
 b.   0.33
 c.   0.10
 d.  -0.20
 e. 0.50 <p>