72
Chapter 4: Graphing Features
PROCEDURE
1. First, let us set the calculator
to the appropriate graphing
coordinate mode. Press
@
;
to enter the
SETUP
menu, press
E
to select
E COORD, then press
4
to select
4 Seq, and press
C
.
2. We will use the “Time”
sequential graph type within
the
FORMAT menu. Press
@
f
, press
G
to
select
G TYPE, and
2
to
select
2 TIME.
3. Then press
Y
. The Graph Equation Entry window will open.
4. Enter a new equation set
u(n-
1) × (1 - 0.6) + 3000
for
u(n)=
.
Press
@
u
(
7
)
to enter
u
and press
X
for
n
. Press
E
when done
entering.
Note: Press
C
to clear the previous entry. Using a capitalized “U” or
“N” here will result in an error upon pressing the
G
key.
5. On the second entry row
(
u(nMin)
=), enter 2000, then
press
E
.
The figure is automatically
enclosed by braces.
6. The
v
and the
w
entry sets will not be necessary in this case, so
press
C
to clear, then press
E
to move one row down.
Repeat until the four unnecessary entry rows are cleared.
7. Press
G
to draw the graph.
8. If the line is outside of the
graph’s range, press
Z
then
1
to select
automatic zoom.
This will only display a small
portion of the graph, so the graph’s range will need to be
changed.