DA0-002 Visualization and Reporting Practice Question
Which chart type is best for visualizing the correlation between two continuous variables?
⚠ Common exam trap
It's easy for candidates to confuse 'correlation between two continuous variables' with 'trend over time' — candidates pick line chart because it also uses two axes, but line charts require an ordered sequence.
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 places each observation as a point on a two-dimensional plane defined by the two continuous variables, making the strength, direction, and shape (linear vs. nonlinear) of their relationship directly visible. It is the standard chart for bivariate correlation 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.
- ✗
Pie chart
Why it's wrong here
A pie chart encodes parts of a single whole as slices, so it cannot plot two continuous variables against each other. It is tempting because pie charts clearly show proportional composition of one total, which is precisely when a pie chart is the right choice.
- ✗
Bar chart
Why it's wrong here
A bar chart plots a categorical dimension against a numeric measure, so it cannot express the paired continuous values a correlation needs. It is tempting because bars compare magnitudes across categories well, and that is exactly the scenario where a bar chart is the right pick.
- ✓
Scatter plot
Why this is correct
A scatter plot places one continuous variable on each axis, so each point represents a paired observation and the resulting cloud reveals the direction, strength and form of correlation. Line charts suit trends over time, and bar charts suit categorical comparisons.
- ✗
Line chart
Why it's wrong here
A line chart orders points along a continuous axis, typically time, so it shows trend rather than the paired relationship between two continuous variables. It is tempting because line charts excel at showing a continuous measure changing over a sequence, which is the scenario where they are correct.
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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.