Lee needs to create a chart comparing sales for 21 regions. What sort of chart would be best?

Question

BlackTom AI · Accepted Answer

When selecting a chart type to compare sales across many regions, it helps to consider how many categories you have and how readable the chart will be.
Option a: 'A column chart as this is the best chart for comparing values.' While column charts can compare values, they become crowded and hard to read when there are many categories (21 regions in this case). This makes it less ideal for a large number of categories.
Option b: 'A pie chart, so that the chart doesn't take up too much room although there are many categories.' Pie charts are not well-suited for comparing many categories because differences become hard to discern once you have many slices, and they can be visually cluttered, especially with 21 regions.
Option c: 'A line chart as you can put a marker on it for each region to make it clearer.' Line charts are best for showing trends over time or continuous sequences. For discrete categories like regions, a line chart is not appropriate, since it implies a temporal or ordered sequence and can mislead interpretation.
Option d: 'A bar chart as there are many categories to compare.' A bar chart (horizontal bars) is a good choice for numerous categories because horizontal space accommodates longer labels (region names) and the comparison across many categories remains readable, even with 21 regions. This is the most suitable option among the four.
Note how the horizontal alignment of bars helps prevent label overlap and keeps the visual clean when dealing with many categories, which is precisely the situation here.

Dashboard Week 9 Quiz 3

Lee needs to create a chart comparing sales for 21 regions. What sort of chart would be best?

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