The TI-83 and TI-84 calculators have a TVM solver for solving problems involving the time value of money. When I taught this topic, most of my students had one of these calculators. But since I lacked an emulator or a document camera, I found it difficult to demonstrate this solver during lectures. I designed this GeoGebra worksheet for any teachers who may find themselves in a similar situation, or for students who do not have a TI-83/84 calculator. The current version can only solve for PV, PMT, or FV.
The seven TVM variables are as follows.
N The number of payments
I% The interest rate, as a percentage. It should not be divided by 100.
PV Present value
PMT Periodic payment
FV Future value
P/Y Payments per year
C/Y Times per year that interest is compounded
You must press Enter or Tab after entering a value in the input box, or the value will not be updated. Note that inflows of cash are considered positive and outflows are negative.
The seven TVM variables are as follows.
You must press Enter or Tab after entering a value in the input box, or the value will not be updated. Note that inflows of cash are considered positive and outflows are negative.
A tutorial on the TVM Solver is available.
Download this worksheet:
Updated 6 Nov 2011 to correctly handle the case of zero interest.