below diagrams. Other things equal, an interest rate increase will: Investment Expected rate of return, r. and real interest rate, (percents) (billions of dollars) Investment Real domestic product. GDP (billions of dollars) (billions c Multiple Choice O leave curve A in place but shift curve B downward O leave curve A in place but shift curve A upward. O shift curve A to the right and shift curve B upward. O shift curve A to the left and shift curve B downward