Question 15 1 pts Other things being constant, what will be the effect of on consumption when the stock prices increase sharply? O decrease O increase O no change O can't determine Question 16 1 pts Other things being constant, what will be the effect on consumption when the interest rates increase sharply? O decrease O no change O can't determine O increase Question 17 1 pts Assume a machine which has a useful life of only one year costs $2,000. Assume, also, that net of such operating costs as power, taxes, and so forth, the additional revenue from the output of this machine is expected to be $2,300. The expected rate of return on this machine is: O 20 percent. 10 percent. O 7.5 percent. O 15 percent