老师好这题是什么意思？ the vertical intercept 是什么意思，为啥一个算NPV 一个IRR？

问题如下：

For a project with initial investment of $280 and annual cash inflows with $90 for next five years. In the NPV profile of this project, the vertical intercept is:

选项：

$170 and the horizontal intercept is 18.22%.

18.22% and the horizontal intercept is $170

$190 and the horizontal intercept is 15.36%

解释：

A is correct. The vertical intercept in the NPV profile is the net present value when cost of capital equals 0%, therefore 90*5-280=170. The horizontal intercept in the NPV profile is IRR, which can be computed by a calculator, 18.22%.