DA0-002 Visualization and Reporting Practice Question
A retail analyst wants to visualize monthly sales over the past year to identify seasonal patterns. Which chart type is best?
⚠ Common exam trap
Test-takers frequently confuse a histogram with a line chart because both use bars or lines, but a histogram bins continuous data without regard to order, while a line chart requires a sequential axis like time to show trends.
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
✓
Line chart
A line chart is best for visualizing monthly sales over time because it explicitly shows trends and seasonal patterns across a continuous time axis. The sequential ordering of months allows the line to connect data points, making it easy to identify peaks, troughs, and recurring cycles. This aligns with the DA0-001 objective of selecting appropriate visualizations for time-series data.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Pie chart
Why it's wrong here
Pie charts show proportions, not trends.
- ✗
Histogram
Why it's wrong here
Histograms show distribution of a single variable, not time trends.
- ✓
Line chart
Why this is correct
Line chart clearly shows trends and seasonal patterns over time.
- ✗
Box plot
Why it's wrong here
Box plots show distribution summary, not trends over time.
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