A recent study by a major financial investment company was interested in determining whether the annual percentage change in stock price for companies is linearly related to the annual percent change in profits for the company. The following data was determined for 7 randomly selected companies. Based upon this sample information, what portion of variation in stock price percentage change is explained by the percent change in yearly profit?
a) 40%
b) 50%
c) 60%
d) 70%
