Final answer:
The NPV rule states that if the Net Present Value (NPV) of a project is positive, then the project should be accepted. The NFPV rule does not exist.
Step-by-step explanation:
The NPV rule states that if the Net Present Value (NPV) of a project is positive, then the project should be accepted. If the NPV is negative, then the project should be rejected. It is a way of evaluating the profitability of an investment by considering the time value of money and discounting future cash flows to their present value.
On the other hand, the NFPV rule does not exist. It may be a typographical error or a misunderstanding, as there is no commonly recognized rule or concept in finance or investment analysis called the NFPV rule.