1. Histograms
A Histogram is a vertical bar graph in which each interval is represented by the width of the bar and the frequency is represented by the height of the bar.
Test Scores of 32 Students
Let’s look at the test score example again. 12 11 10 9 8 7 6 5 4 3 2 1
Frequency
Test Scores ( Intervals)

2. Another Histogram
The following table represents the number of miles per gallon obtained by 40 drivers.
Miles per Gallon for 40 Drivers 12 11 10 9 8 7 6 5 4 3 2 1
Frequency
Mileage (Miles per Gallon)

3. Cumulative Histogram Cumulative Histogram
The following table represents test scores of 240 students in a school.
Now let’s make a Cumulative Frequency Table.
Cumulative Histogram 75 70 65 60 55 50 45 40 35 30 25 20 15 10 5
240
220
200
180
160
140
120
100 80 60 40 20
Frequency
Frequency
Test Scores
Test Scores

4. More Cumulative Histograms
The following table represents the number of book students bring home.
Cumulative Number of Books Brought Home 25 20 15 10 5
Frequency
Number of Books

5. More Cumulative Histograms
The following table represents the number of book students bring home.
Cumulative Number of Books Brought Home 30 25 20 15 10 5
Frequency
Number of Books

6. Homework Page 735: 10 – 13 Make a frequency histogram
Make a cumulative frequency histogram