When the rate of return is equal to the discount rate A. the cost of an investment equals the present value of its benefits. B. the present value of an investment's benefits must be greater than its cost. C. the cost of an investment equals the future value of its benefits. D. the cost of an investment equals the sum of its benefits. Under current laws, a couple filing jointly with a total income of $75,000 would pay a 15% tax on capital gains. True False Beta is the slope of the best fit line for the points with coordinates representing the and the for each one of several years. A. rate of return; level of risk for an individual security B. market rate of return; security's rate of return C. risk level of a stock; market rate of return D. rate of inflation; rate of return for an individual security