Figure 14.6 examines the SUM (Gross Profit) from each Product Category
from our example. This graph uses color to indicate a profit (green) or a loss (red).
In fact, the intensity of the color indicates the amount of profit or loss.
This graph can be used to explore the situation more deeply by selecting the
three clusters of circles that are bright red, isolating them, and then looking at the
data for those observations in more detail. Users can examine graphs or simply
look at the observations in a table. Once again, they have control over how the
information is presented and thus control their task for best cognitive fit.