Chapter 10 Math 289
of time in which the cases were recorded (January–December). Data was
entered for each month, and the line connecting the data points illustrates
the trends in number of fl u cases. You can see that in the winter months
the fl u cases were highest, and in the summer months the number of cases
declined.
The bar graph in Figure 10.14 shows the same values represented on
the x and y axes as Figure 10.13. In the case of a bar graph, the number of
fl u cases per month is easily read. Data trends are also easy to identify by
comparing the height of each month’s bar.
Creating Charts and Graphs
1. John works in sports medicine. Broken arms account for 1/4 of his
patients’ injuries, knee injuries make up another 1/4 of the cases, broken
fi ngers account for 1/8 of his cases, 1/8 are elbow injuries, and 1/4 are
shoulder injuries. Create a pie chart representing this data.
2. Emile works in the human resources department of Eastridge Hospi-
tal. His boss has asked him to make a bar graph showing how many total
sick days hospital employees used during each month of the last year.
Put the following data into a bar graph:
January: 190
February: 195
March: 165
April: 130
May: 125
June: 115
July: 110
August: 100
September: 110
October: 125
November: 140
December: 180
Real Life Scenario
Winter
Annual Influenza Cases at Eastridge Clinic
Spring
Summer
Fall
Figure 10.15 A circle graph is sometimes called a pie chart.