Texas Instruments TI-84 - Manual (Page 156)

Chapter 6: Sequence Graphing 153
3. Press
o. If the graph-style icon is not ç (dot),
press
| |, press Í until ç is displayed, and
then press
~ ~.
4. Press
 ~
3 to select iPart( (integer part)
because only whole trees are harvested. After
each annual harvest, 80 percent (.80) of the trees
remain.
Press
Ë
8
y
[u]
£ „ ¹
1
¤ to define the
number of trees after each harvest. Press
Ã
1000
¤ to define the new trees. Press †
4000 to define
the number of trees at the beginning of the
program.
5. Press
p
0 to set nMin=0 . Press
†
50 to set
nMax=50 . nMin and nMax evaluate forest size over
50 years. Set the other window variables.
PlotStart=1 Xmin=0 Ymin=0
PlotStep=1 Xmax=50 Ymax=6000
Xscl=10 Yscl=1000
6. Press
r. Tracing begins at
nMin (the start of
the forestry plan). Press
~ to trace the sequence
year by year. The sequence is displayed at the top
of the screen. The values for
n (number of years),
X ( X=n , because n is plotted on the x-axis), and Y
(tree count) are displayed at the bottom. When will
the forest stabilize? With how many trees?