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Enter the data by first pressing STAT to access the statistics menu. Touch
A EDIT and press ENTER to access the statistics data entry screen. To delete
old data, highlight L1 and press DEL ENTER to delete List 1. Repeat for
additional lists. Enter the data using L1 for the year and L2 for the revenue
(in millions of dollars). Check the data and correct any errors you may find.
Press 2ndF STAT PLOT , touch A PLOT1, and press ENTER to access the
PLOT1 set up screen. To turn PLOT 1 on, press ENTER . Press ▼
ENTER to set the data to two-variable. Set L1 for the x-variable by pressing
▼ 2ndF L1 ENTER . Press 2ndF L2 ENTER to set L2 for the y-variable.
To set the graph to scatter diagram, press 2ndF STAT PLOT , touch G S.D.,
and double touch 3 Scattr. Construct an autoscaled scatter diagram of this data
set by pressing ZOOM , touching A ZOOM, touching on the screen, and
double touching 9 Stat. You will see the following graph:
Autoscaling the scatter diagram sets the graphics screen so that the lower left
corner of the screen is the data point at which the minimum value of x occurs
and the upper right corner of the screen is the point at which the maximum
value of x occurs. Press TRACE and press repeatedly to verify that
Xmin= 1990, Xmax= 1996, Ymin= 48.63, and Ymax= 52.03.
Graphical Portrayal of a Two-Variable Data Set/STATISTICS USING THE SHARP EL-9600 33
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