How do I use the TI83 to solve compound interest and annuity problems?

Case 1: Calculate the value of $1000.00 and 7 years at 10.0% interest compounded monthly.

  1. [2nd] [Finance] "TV Solver..." [enter]
  2. N=7
  3. I%=10
  4. PV=-1000
  5. PMT=0
  6. FV=0
  7. P/Y=1
  8. C/Y=12
  9. PMT:END (doesn't matter actually)
  10. place cursor over FV, press [2nd] [solve]

Case 2: A car costs $9,000. You can afford payments of $250 per month for 4 years (48 months). What is the maximum interest rate you can afford?

  1. [2nd] [Finance] "TV Solver..." [enter]
  2. N=48
  3. I%=0
  4. PV=9000
  5. PMT=-250
  6. FV=0
  7. P/Y=12
  8. C/Y=12
  9. PMT:END
  10. place cursor over I%, press [2nd] [solve]
Note: in both cases, all variables (but one) are entered, and the last is calculated via the [2nd] [solve] command ...