EL-9900 Graphing Calculator
Pie Charts and Proportions
Pie charts enable a quick and clear overview of how portions of data relate to the whole.
A questionnaire asking students about their favourite colour elicited the following results:
Red: 20 students
Blue: 12 students
Green: 25 students
Pink: 10 students
Yellow: 6 students
2-1
NotesStep & Key Operation Display
There may be differences in the results of calculations and graph plotting depending on the setting.
Return all settings to the default value and delete all data.
Before
Starting
1. Make a pie chart based on this data.
2. Find the percentage for each colour.
Example
Pie charts can be made easily with the EL-9900.
Make another pie chart. Red: 27.39%
Blue: 16.43%
Green: 34.24%
Pink: 13.69%
Yellow: 8.21%
2-2
GRAPH
Choose the setting for displaying
by percentages.
2-1
STAT
PLOT A
ENTER
STAT
PLOT F2
Make a pie chart.
1-3
GRAPH
Choose the setting for making a
pie chart.
1-2
STAT
PLOT A
ENTER ENTER
STAT
PLOT F1
Enter the data.
1-1
A
STAT ENTER
20
ENTER
1
2
ENTER
ENTER
2510
ENTERENTER
6