The study of factors that contribute to the economic growth of a country is known as

When economists speak of the short run, they are referring to _____

a. a specific period of time, usually less than one year b. a specific period of time, more than one year, but less than two years c. a specific period of time just long enough that the quantities of all resources can be varied d. a period of time short enough that the quantities of at least one of the resources cannot be varied e. a period of time short enough that none of the quantities of the resources can be varied

If the price of good X (measured on the horizontal axis of a budget line diagram) increases at the same time that the price of good Y (measured on the vertical axis) decreases, the budget line

a. will become flatter b. will become steeper c. could become either steeper or flatter, depending on the sizes of the price changes d. will rotate about its original point of intersection with the horizontal axis e. will shift outward, but not in a parallel fashion