6–12 Sequence Graphing
82EAB9~1.DOC TI-83 international English Bob Fedorisko Revised: 10/28/05 9:28 AM Printed: 10/28/05 9:28
M Page 12 of 16
1. Press o in Seq mode to display the sequence Y= editor. Make
sure the graph style is set to í (dot), and then define
nMin, u(n)
and u(nMin) as shown below.
2. Press y [FORMAT] Í to set Time axes format.
3. Press p and set the variables as shown below.
nMin=1 Xmin=0 Ymin=L10
nMax=25 Xmax=25 Ymax=10
PlotStart=1 Xscl=1 Yscl=1
PlotStep=1
4. Press s to graph the sequence.
5. Press y [FORMAT] and select the Web axes setting.
6. Press p and change the variables below.
Xmin=L10 Xmax=10
7. Press s to graph the sequence.
8. Press r, and then press ~ to draw the web. The
displayed cursor coordinates
n, X (u(nN1)), and
Y (u(n)) change accordingly. When you press ~, a new n
value is displayed, and the trace cursor is on the sequence.
When you press ~ again, the
n value remains the same, and
the cursor moves to the
y=x reference line. This pattern repeats
as you trace the web.
Using Web Plots to Illustrate Convergence
Example:
Convergence
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