1. In a study about holiday goods on sale, a researcher is interested in the relationship between number of units of an item purchased on sale and the amount spent in total after savings. a) The independent (explanatory) variable is:

• the amount spent in total after savings
• number of units purchased on sale

b) The dependent (response) variable is:

• the amount spent in total after savings
• number of units purchased on sale

c) The linear correlation between the two variables will most likely be:

• positive
• negative
• none