A retail store uses sales data to make a regression line. The independent variable x represents time and the dependent variable y represents sales.

Which of the following situations could producedata sets or plots that have a regression line with a negative slope? Select all that apply.

Select all that apply:

The percent change in the total sales is so good that everyone is talking about it.

The company's supplier is experiencing a shortage of materials to manufacture the items that the store sells.

The sales staff decreased in size when some members transferred to a new store that opened across town.

Because of company growth, the human resources department hired more store employees.