DA0-002 Visualization and Reporting Practice Question
A data analyst needs to show the relationship between advertising spend (in dollars) and monthly sales revenue (in dollars) for the past 12 months. Which chart type is most appropriate?
⚠ Common exam trap
DA0-002 often tests chart selection; candidates may choose line chart because data is over 12 months, but the goal is to show relationship, not trend over time.
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
✓
Scatter plot
A scatter plot is the most appropriate chart to show the relationship between two numerical variables, such as advertising spend and sales revenue. It plots each pair of values as a point, allowing the analyst to visually assess correlation, trends, and outliers. Line charts are better for time series, bar charts for categorical comparisons, and pie charts for proportions.
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 this is correct
A scatter plot pairs advertising spend against sales revenue as two continuous numeric variables, exposing correlation, trend and outliers across the 12 months. This satisfies the requirement to show the relationship between the two dollar-denominated measures.
- ✗
Line chart
Why it's wrong here
A line chart plots a single measure against a continuous axis, typically time, so it shows trend rather than correlation between two dollar variables. It is tempting because the data spans twelve months, but the question asks for the relationship between spend and revenue, which a scatter plot reveals.
- ✗
Bar chart
Why it's wrong here
Bar charts compare discrete categories or aggregate values using length, so they do not display the paired relationship between two continuous numeric variables. They suit comparing monthly revenue totals side by side, but advertising spend versus sales revenue across twelve observations calls for a scatter plot.
- ✗
Pie chart
Why it's wrong here
A pie chart encodes parts of a single whole as slices, so it cannot plot two separate dollar measures against each other across twelve months. It is tempting for showing proportional breakdowns, such as each month's share of annual revenue, but correlation between two variables requires a scatter plot.
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Last reviewed September 2026 · checked against the official CompTIA exam blueprint
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