Following data refers to the years of service (variable x) put in by seven specialized workers in a factory and their monthly incomes (variable y). x variable values with corresponding y variable values can be listed as: 11 years of service with income 700, 7 years of service with income 500, 9 years of service with income 300, 5 years of service with income 200, 8 years of service with income 600, 6 years of service with income 400, 10 years of service with income 800.
Find the correlation coefficient.
a. 0.45
b. 0.29
c. 0.36
d. 0.75
