For Question 1, please use the following information: P&G wants to know if sales of Crest White Strips in the Northeastern region of the United States have increased at least 2% over the past year.

The marketing team on the Pampers brand team at P&G wants to understand if there is a correlation between labeling diapers as "Pure and Natural" and sales. Their correlation analysis gives them a value of 0.91. Is there a correlation? Select one:

a. a. Yes, the value of 0.91 is strong and indicates and positive correlation.

b. b. Yes, the value of 0.91 is strong and indicates a negative correlation.

c. c. No, the value of 0.91 is weak and indicates there is little correlation.

d. d. No, the value of 0.91 indicates an inverse relationship.