An online clothing retailer examined their transactional database to see if total yearly purchases ($) were related to customers' incomes ($). (you may assume that the assumptions and conditions for regression are met.) the least squares linear regression is shown below. complete parts a through d purchases 32.8 +0.013(income) a) interpret the intercept in the linear model. select the correct choice below and fill in the answer box to complete your choice. o a. the intercept of indicates the customer income if the predicted total yearly purchase was so. o b. the intercept of indicates the predicted total yearly purchase if a customer's income was $0 o c. the intercept of is meaningless and should not be interpreted. o d. the intercept indicates that customer income changes by for every $1 increase in total yearly purchase. b) interpret the slope in the linear model. select the correct choice below and fill in the answer box to complete your choice. o a. the slope indicates that custome income changes by s for every $1 increase in total yearly purchase. o b. the slope of is meaningless and should not be interpreted o c. the slope indicates that the total yearly purchase changes by s for every $1 increase in customer income. o d. the slope of indicates the customer income if he predicted total yearly purchase was $0