The process for converting present values into future values is calledcompounding $.$ This process requires knowledge of the values of three of four time$-$value$-$of$-$money variables. Which of the following is not one of these variables?

The duration of the deposit $($N$)$

The present value $($PV$)$ of the amount deposited

The trend between the present and future values of an investment

The interest rate $($I$)$ that could be earned by deposited funds