4. Construct a table from the data shown in the accompanying graph. Which is the dependent variable and which the independent variable? Summarize the data in equation form. [LOA1.1]

5. Suppose that when the interest rate on loans is 16 percent, businesses find it unprofitable to invest in machinery and equipment. However, when the interest rate is 14 percent, $5 billion worth of investment is profitable. At 12 percent interest, a total of $10 billion of investment is profitable. Similarly, total investment increases by $5 billion for each successive 2-percentage-point decline in the interest rate. [LOA1.1]