Apple Pages '08 - Manual (Page 202)

202 Chapter 10 Using Charts
For example, you may want to create a chart that shows how many employees work in
Region 1 and Region 2 each year. Such a table might have two rows (one for Region 1
and one for Region 2) and four columns (one for each year from 2007 through 2010).
There are several ways to represent this data in a chart. In a bar chart, for example:
 You can plot 2007 employee counts for Region 1 and Region 2 in side-by-side bars,
followed by pairs of bars for 2008, 2009, and 2010. Such a chart would have two data
series and four data sets.
Region 1 and Region 2 are called data series; each region is represented by a series of
data values. Data values (data points) for each region are represented by bars that are
grouped side by side in the chart; each group is called a data set (2007 is a data set,
2008 is a data set, and so on).
These squares indicate
which color represents
each data series.
The chart legend denotes
the two data series.
The data sets contain one
data point (one bar) from
each of the data series.
These four bars represent
one data series.