Texas Instruments TI-83 PLUS - Manual (Page 197)

TI-83 Plus Sequence Graphing 194
Displaying the Graph Screen
In Web format, press s to display the graph screen. The TI-83 Plus :
•
Draws a
y=x
reference line in AxesOn format.
•
Plots the selected sequences with u( n N 1) as the independent
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.
Drawing the Web
To activate the trace cursor, press r . The screen displays the
sequence and the current n , X , and Y values ( X represents u( n N 1) and Y
represents u( n) ). Press ~ repeatedly to draw the web step by step,
starting at nMin . In Web format, the trace cursor follows this course.
1. It starts on the x-axis at the initial value u( nMin) (when PlotStart=1 ).
2. It moves vertically (up or down) to the sequence.
3. It moves horizontally to the
y=x
reference line.
4. It repeats this vertical and horizontal movement as you continue to
press ~ .