A term used to describe the case when the independent variables in a multiple regression model are correlated is . a. multicollinearity b. correlation c. regression d. None of these answers are correct.

Multicollinearity occurs when independent variables in a regression model are correlated. This correlation is a problem because independent variables should be independent.

Step-by-step explanation:

35 necklaces multiplied by 4 weeks is 140. Multiply 140 by 15, representing the amount of money each necklace costs and you get 2,100. That is the total amount sold, but because the 6 costumers brought their necklaces back, you have to take 6 times 15 to see how much the total returned necklaces cost. That would be $210, so you take $2,100 and subtract $210, and your answer is $1,180. That is the final answer.