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?
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 specifically designed to show the relationship between two continuous variables and can reveal correlations, clusters, or outliers. Option A is wrong because pie charts show proportions of a whole, not relationships between two continuous variables. Option B is wrong because line charts show trends over time, not correlation between two variables. Option C is wrong because bar charts compare discrete categories, not continuous relationships.
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 of a whole, not relationships between variables.
- ✗
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
Bar charts compare discrete categories, not continuous relationships.
- ✓
Scatter plot
Why this is correct
Scatter plots show the relationship between two continuous variables and can reveal correlations.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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