Graphing Web Plots - Texas Instruments TI-82 STATS Manual Book

Graphing Web Plots

Graphing a Web
Plot
Valid Functions
for Web Plots
Displaying the
Graph Screen
Drawing the Web
axes format, press y [
To select
Web
web plot graphs
u(n)
long-term behavior (convergence, divergence, or oscillation) of
a recursive sequence. You can see how the sequence may
change behavior as its initial value changes.
When axes format is selected, a sequence will not graph
Web
properly or will generate an error.
It must be recursive with only one recursion level (
but not ).
u(nN2)
It cannot reference
It cannot reference any defined sequence except itself.
format, press s to display the graph screen. The
In
Web
TI-82 STATS:
Draws a reference line in
y=x
Plots the selected sequences with
variable.
Note: A potential convergence point occurs whenever a sequence
intersects the y=x reference line. However, the sequence may or may
not actually converge at that point, depending on the sequence's
initial value.
To activate the trace cursor, press r. The screen displays
the sequence and the current
and represents
u(nN1) Y
web step by step, starting at
cursor follows this course.
1. It starts on the x-axis at the initial value
).
PlotStart=1
2. It moves vertically (up or down) to the sequence.
3. It moves horizontally to the
4. It repeats this vertical and horizontal movement as you
continue to press ~.
FORMAT
versus , which you can use to study
u(nN1)
directly.
n
AxesOn
u(nN1)
, , and
n X Y
). Press ~ repeatedly to draw the
u(n)
. In
nMin Web
reference line.
y=x
Sequence Graphing 6–11
] ~ Í. A
u(nN1)
format.
as the independent
values ( represents
X
format, the trace
(when
u(nMin)