DA0-002 Visualization and Reporting Practice Question
A data analyst is creating a report to compare the performance of sales regions across multiple years. The report will be used by regional managers to identify trends. Which visualization approach best supports this?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Small multiples of line charts, one per region
Small multiples (trellis charts) allow comparison of multiple time series in a compact, consistent layout, making it easy to spot trends across regions.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
A single line chart with all regions overlaid
Why it's wrong here
Overlaying many lines can be cluttered and hard to read.
- ✗
A bar chart with years on x-axis and regions as grouped bars
Why it's wrong here
Grouped bar charts are better for comparing categories at discrete time points, not trends.
- ✗
A stacked area chart with all regions
Why it's wrong here
Stacked area charts show cumulative totals, not individual trends.
- ✓
Small multiples of line charts, one per region
Why this is correct
Small multiples facilitate comparison while maintaining clarity.
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