Bar Graphs and Histograms

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Slide 14

Step 1

Make a frequency table of the data. Be sure to use equal intervals

Slide 15

Step 2

Choose an appropriate scale and interval for the vertical axis. The greatest value on the scale should be at least as great as the greatest frequency.

Slide 16

Step 3

Draw a bar for each interval. The height of the bar is the frequency for that interval. Bars must touch but not overlap.

Label the axes and give the graph title

Slide 17

Slide 18

Can you now make a bar graph, double bar Graph and a histogram?

Slide 19

The list below shows the results of a typing test in words per minute. Make a histogram of the data.

62, 55, 68, 47, 50, 41, 62, 39, 54, 70, 56, 70, 56, 47, 71, 55, 60, 42

Slide 20

The end