Texas Instruments TI-89 User Manual
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Sequence Graphing
Sequence Graphing
Sequence Graphing
Sequence Graphing
A small forest contains 4000 trees. Each year, 20% of the trees will be harvested (with
80% remaining) and 1000 new trees will be planted. Using a sequence, calculate the
number of trees in the forest at the end of each year. Does it stabilize at a certain
number?
80% remaining) and 1000 new trees will be planted. Using a sequence, calculate the
number of trees in the forest at the end of each year. Does it stabilize at a certain
number?
5. Select
ZoomSqr
, which regraphs the
equation.
ZoomSqr
increases the range along the
x axis so that the graph is shown in
correct proportion.
correct proportion.
Press
„ 5
You can change values for A and B as
necessary and regraph the equation.
necessary and regraph the equation.
Initially
After 1 Year
After 2 Years
After 3 Years
. . .
4000
.8 x 4000
+ 1000
+ 1000
.8 x (.8 x 4000 +
1000) + 1000
1000) + 1000
.8 x (.8 x (.8 x
4000 + 1000) +
1000) + 1000
4000 + 1000) +
1000) + 1000
. . .
Steps and keystrokes
Display