Previews 59
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?
5. Select ZoomSqr, which regraphs the
equation.
ZoomSqr increases the range along the
x axis so that the graph is shown in correct
proportion.
Press „ 5
You can change values for A and B as
necessary and regraph the equation.
Initially After 1 Year After 2 Years After 3 Years . . .
4000 .8 x 4000
+ 1000
.8 x (.8 x 4000 +
1000) + 1000
.8 x (.8 x (.8 x
4000 + 1000) +
1000) + 1000
. . .
Steps and keystrokes Display
1. Display the
MODE dialog box. For Graph
mode, select SEQUENCE.
Press 3 B 4 ¸
Steps and keystrokes Display
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