DA0-002 Visualization and Reporting Practice Question
A data analyst wants to show the monthly sales trend for the past two years with an emphasis on cumulative growth. Which chart type is most appropriate?
⚠ Common exam trap
Watch out — candidates often choose a line chart (Option D) because it shows trends, but they overlook that the area chart is specifically designed to emphasize cumulative growth through its filled region, which is the key requirement in the question.
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
✓
Area chart
An area chart is the most appropriate choice because it combines a line chart's ability to show trends over time with a filled area beneath the line, which visually emphasizes cumulative growth. For monthly sales data over two years, the area fill makes it easy to see both the month-over-month trend and the total accumulated sales volume, which is exactly what the data analyst needs.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Scatter plot
Why it's wrong here
Scatter plots show correlation, not trend over time.
- ✗
Bar chart
Why it's wrong here
Bar charts are for comparing categories, not trends.
- ✓
Area chart
Why this is correct
Area charts highlight cumulative totals over time.
- ✗
Line chart
Why it's wrong here
Line charts show trend but do not emphasize cumulative growth as effectively.
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