Page 406 - Math Smart - 7

17.2.2 Bar charts

Look at the frequency table for Mimie's cafe on p. 399 again. The same data can
be represented as a bar chart.

A vertical bar chart

bar chart title -Customers visiting Mimie's cafe
^ width
35-

30-

25 n
vertical axis Number of 20-
label customers
15^

10-

5-

The bar chart must
have a title, a label for Monday Tuesday Wednesday Thursday Friday Saturday Sunday
each axis, values on Day •«- — horizontal
one of the axes and a axis label
value or bar label
label for each bar.
frequency
The bars should be of
equal width and the
A horizontal bar chart
gaps between the bars
should be of equal Customers visiting Mimie's cafe
size.
Monday
The bars in a
bar chart can be Tuesday
drawn vertically or
Wednesday
horizontally.
Thursday

bars of equal
width
Saturday
Sunday

T
T
10 15 20
Number of customers

In the vertical and horizontal bar charts, the length of each bar represents the
number of customers that visited the cafe each day. Bar charts are usually more
accurate than pictograms as the axes can be adjusted to different scales to suit the
data values.

^02 UNITTtIB
Data Ha
I