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.

P&G wants to know if people who live within urban areas are more likely to buy Crest White Strips than rural areas. Given the question, "does location impact sales of Crest White Strips" what is the independent variable and what is the dependent variable?