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
N1) 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
N1) and Y
represents u(
n
)). Press ~ repeatedly to draw the web step by step,
starting at
n
Min. In Web format, the trace cursor follows this course.
1. It starts on the x-axis at the initial value u(
n
Min) (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 ~.