## TI 83 Information

The newer TI-83 Plus is not identical.

Financial Variables
N, number of periods
I%, rate of interest per year
P/Y, number of payment periods per year
C/Y, number of compounding periods per year
PMT, payment per period
PV, present value
FV, future value
Conventions
Payments which increase the balance are positive numbers.
Payments which decrease the balance are negative numbers.
Future values are withdrawals, usually entered as negative numbers.

Floating Decimal
Press MODE, place the cursor on Float, press ENTER, press CLEAR.
Financial Mode
Press 2nd FINANCE, then press ENTER (for TVM Solver).
Clearing Financial Data
Move the cursor to the appropriate variable and enter zero.
Beginning Annuities
Move the cursor to BEGIN, then press ENTER.

Entering Financial Data
Move the cursor to the appropriate variable and enter the value.
When you enter a value for P/Y, the value of C/Y will automatically change to the same value. Therefore, you do not need to enter a value for C/Y.
Computing Values
Move the cursor to the appropriate variable and press ALPHA SOLVE. (SOLVE is an additional function of the ENTER key.)

Example:
Tom's account begins with \$500, and earns 6% per year, compounded monthly. He deposits an additional \$50 at the end of each month. What will the balance be at the end of one year?

The variables are:
 N = 12 I = 6/12 PMT = 50 increasing PV = 500 FV = ???

The keystrokes are:
2nd FINANCE ENTER
12 ENTER
6 ENTER
500 ENTER
50 ENTER
ENTER
12 ENTER
Move the cursor to END, press ENTER
Move the cursor to FV, press ALPHA SOLVE.

The answer is \$1,147.62, rounded to the nearest cent. The negative sign indicates that the amount can be withdrawn from the account.