TI-84 Plus and Silver Edition Manual

64 Activities

After you execute the program above, you can recall and display the

picture with the instruction RecallPic 6.

Graphing Cobweb Attractors

Problem

Using Web format, you can identify points with attracting and repelling

behavior in sequence graphing.

Procedure

1. Press z. Select Seq and the default mode settings. Press y

.. Select Web format and the default format settings.

2. Press o. Clear all functions and turn off all stat plots. Enter the

sequence that corresponds to the expression Y = K X(1NX).

u(n)=Ku(nN1)(1Nu(nN1))

nMin)=.01

3. Press y 5 to return to the home screen, and then store 2.9 to K.

4. Press p. Set the window variables.

5. Press r to display the graph, and then press ~ to trace the

cobweb. This is a cobweb with one attractor.

:Pt-On(X,Y)

:End

:StorePic 6

Draw point.

End of For group.

Store picture.

nMin=0

nMax=10

PlotStart=1

PlotStep=1

Xmin=0

Xmax=1

Xscl=1

Ymin=

M.26

Ymax=1.1

Yscl=1