DA0-002 Visualization and Reporting Practice Question
A data analyst needs to visualize the relationship between two continuous variables, such as sales revenue and advertising spend, to identify potential correlation. Which chart type is most appropriate?
⚠ Common exam trap
DA0-002 often tests the confusion between line charts and scatter plots, where candidates may incorrectly choose line chart for correlation because it also shows relationships, but line charts are for time series.
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 visualize the relationship between two continuous variables, such as sales revenue and advertising spend. It plots each data point on a two-dimensional plane, allowing the analyst to observe patterns, trends, and potential correlation.
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
A pie chart encodes parts of a single whole, so it cannot plot two continuous variables against each other or reveal correlation. It is tempting when showing proportional composition, such as each product's share of total revenue, where category shares rather than relationships are the question.
- ✗
Line chart
Why it's wrong here
A line chart requires a sequential axis, typically time, to connect data points in order, but this scenario involves two continuous variables without a natural sequence, so the chart would impose false relationships between unordered observations. It is tempting because line charts effectively show trends over time, and an analyst might mistakenly use one to visualise correlation between sales and advertising spend if they incorrectly treat one variable as a time series.
- ✗
Bar chart
Why it's wrong here
A bar chart plots a categorical axis against a measure, so two continuous variables cannot both be represented and correlation stays hidden. It is tempting for comparing totals across categories, such as revenue per region, where discrete groups rather than paired numeric values are compared.
- ✓
Scatter plot
Why this is correct
A scatter plot places one continuous variable on each axis, so each point represents a paired observation. This reveals correlation strength, direction, and outliers between sales revenue and advertising spend, which categorical or part-to-whole charts cannot show.
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Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official CompTIA exam blueprint
This DA0-002 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DA0-002 exam.