Texas-instruments TI-73 EXPLORER User Manual Page 181

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Chapter 9: Function Graphing
175
7309ENG.DOC CH 9 Function Graphing, English Julie Hewlett Revised: 07/29/98 12:14 PM Printed: 05/19/99
9:01 AM Page 175 of 24
Determining Window Values for a Specific GraphDetermining Window Values for a Specific Graph
The following example shows how you can adjust the
WINDOW
values manually (as opposed to using the standard
WINDOW
values set by (
6:ZStandard
).
Yuko practices the piano 50 minutes per day. How many
minutes has he practiced after 2, 4, and 5 days? Graph your
answer.
1. A table of coordinate
pairs would look like
this:
X Y
2 100
4 200
5 250
2. A possible graph of the ordered pairs would look like this
(the
WINDOW
values are labeled):
³
Y=50X
X=number of days
Y=number of total minutes
The
Y
-axis is
measured in
increments of 50;
therefore,
Yscl=50
.
Ymax=300
Xmin=0
Ymin=0
Xmax=6
50
2
34
5
6
1
0
100
150
200
300
250
The
X
-axis is measured in increments
of 1; therefore,
Xscl=1
.
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