CompTIA Data+ (DA0-002)VisualizationEasy
A data analytics team is tasked with creating a report that compares the market share of five major technology companies within the smartphone industry over the past ten years. The report needs to clearly show how each company's share has changed relative to the others and the total market over time. Which type of chart would be MOST appropriate for this visualization?
- APie Chart
- BBubble Chart
- CStacked Area Chart
- DBar Chart
Show answer & explanationAnswer & explanation
Correct answer: C. Stacked Area Chart
A stacked area chart is ideal for showing how the composition of a whole changes over time, making it perfect for visualizing market share changes where the sum of all parts (companies' shares) equals 100% of the market.
Why the other options are wrong
- A. Pie charts are for showing parts of a whole at a single point in time, and are not suitable for showing changes over time or comparing many categories.
- B. Bubble charts are used to display three dimensions of data (x, y, and size), often for showing relationships, not for market share composition over time.
- D. Bar charts are good for comparing discrete categories at a specific point in time, but less effective for showing composition change over time.
Stacked Area Chart
A chart that displays the contribution of multiple data series to a total over time, with each series stacked on top of the previous one.
- Shows changes in composition over time.
- Emphasizes the total and the proportion of each component.
- Useful for visualizing market share, population demographics, etc.
Memory trick: Areas Stacked, Shares Tracked.