DA0-002 Visualization and Reporting Practice Question
A data analyst needs to present the correlation between advertising spend and website traffic. Which chart type is most appropriate?
⚠ Common exam trap
Candidates often choose a line chart because they mistakenly think 'correlation' implies a trend over time, but the DA0-001 exam specifically tests that scatter plots are the standard for bivariate correlation analysis without a temporal component.
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 type for visualizing the correlation between two continuous variables, such as advertising spend and website traffic. It displays individual data points on a Cartesian plane, allowing the analyst to assess the strength, direction, and form of the relationship (e.g., linear, non-linear, or no correlation). This aligns with the DA0-001 objective of selecting the correct visualization for bivariate analysis.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Bar chart
Why it's wrong here
A bar chart compares discrete categorical values, so it cannot display the paired relationship between two continuous variables like spend and traffic. It is tempting because bars are familiar, but it would be correct for comparing totals across categories, not correlation.
- ✗
Line chart
Why it's wrong here
A line chart plots a continuous variable against time, implying sequential order, so it misrepresents a spend-versus-traffic correlation where neither axis is temporal. It is tempting because both variables are continuous, but it would be correct for showing trends over time.
- ✗
Pie chart
Why it's wrong here
A pie chart shows parts of a whole as proportions of a single total, so it cannot represent the relationship between two separate continuous variables. It is tempting for its simplicity, but it would be correct for showing category composition, not correlation.
- ✓
Scatter plot
Why this is correct
A scatter plot encodes each observation as a point on two continuous axes, revealing the strength, direction, and shape of the relationship between advertising spend and website traffic. Correlation is a pairwise association, so this two-variable encoding satisfies the requirement precisely.
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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.