Class Copy

Predator-Prey Simulation on the TI-83

You will be using the TI-83 and a Predator-Prey simulation program to investigate population cycles.

Assignment

The student will:

  1. be assigned a variable to investigate.
  2. use the TI-83 with the PREDPREY simulation program to investigate their variable's effect.
  3. use the Data Process to neatly and completely record data in your journal.
  4. analyze the data to determine the effect of that variable on the Predator-Prey population cycles.
  5. report to the class their findings.

Variable List

You will be assigned one of these variables to investigate.

  1. Change the number of rabbits. Range: minimum to maximum. Step: 200.
  2. Change rabbit growth rate. Range: minimum to maximum. Step: 1.
  3. Change rabbit death rate. Range: minimum to maximum. Step: 1.
  4. Change the number of wolves. Range: minimum to maximum. Step: 20.
  5. Change wolf growth rate. Range: minimum to maximum. Step: 1.
  6. Change wolf death rate. Range: minimum to maximum. Step: 1.

Data Process

You will use this process to neatly and completely record data in your journal.

  1. Record the simulation starting conditions.
  2. Graph the Predator-Prey curve.
  3. Change your variable.
  4. Graph the Predator-Prey curve.
  5. Record data for curves:
    1. Record the variable's new value.
    2. Sketch general shape of curves.
    3. Record time and value for rabbit curve minimums and maximums.
    4. Record time and value for wolf curve minimums and maximums.
  6. Repeat steps 3 through 5 for the range of change suggested for your variable in the Variable List.