Texas Instruments TI-73 EXPLORER - Manual (Page 181)

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 Graph Determining 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 3 4 5 6 1 0
100
150
200
300
250
The X -axis is measured in increments
of 1; therefore, Xscl=1.