Texas Instruments CBL 2, Руководство по началу работы

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34 G
ETTING
S
TARTED WITH THE
CBL 2™ S
YSTEM
© 2000, 2003 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
Analysis
1.
From DataMate's Main Screen, press  GRAPH, and
answer the questions 2-6 on the Student Data Reporting
Sheet.
The slope of a line is the steepness of the line or the rate of change. The
numerical value of the slope can be related to many physical models. In this
model the slope is approximately voltage per battery. The unit of the slope in
this model is voltage/battery. An equation that is often used for this linear
model is called the slope-intercept form, which is:
Y = AX + B
where A= the slope and B= the intersection of the line and the Y-axis (or the
value of Y when X=0) which is also called the Y-intercept . You may have seen
this equation written as y=mx+b, where m is the slope.
2.
Answer question 7 on the Student Data Reporting Sheet.
3.
From the graph screen, press
Í
, then press
À
for
Main Screen.
4.
Press ¶ ANALYZE.
5.
Press
Á
CURVE FIT.
6.
Press À LINEAR (CH1 VS ENTRY). Copy this regression information into question
8 on the Student Data Reporting Sheet.
7.
Press
Í
to see the graph of your data and the curve fit.
8.
Press
Í
, then
À
RETURN TO MAIN SCREEN, then
¸
QUIT to leave DataMate.
9.
Complete questions 9 and 10 on the Student Data Reporting Sheet.