For the following scores,

X	Y
4	5
6	5
3	2
9	4
2	3
2	3

a. Compute the Pearson correlation.

b. Add 2 points to each X value and compute the correlation for the modified scores. How does adding a constant to every score affect the value of the correlation?

c. Multiply each of the original X values by 2 and compute the correlation for the modified scores. How does multiplying each score by a constant affect the value of the correlation?