DA0-002 Visualization and Reporting Practice Question
An analyst creates a scatter plot with three variables: X, Y, and a third variable represented by the size of the markers. This chart is called a:
⚠ Common exam trap
Many candidates confuse a bubble chart with a heat map because both can represent three variables, but the heat map uses color gradients on a grid, not marker size on a scatter plot.
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
✓
Bubble chart
A bubble chart is a variation of a scatter plot where a third numeric variable is encoded by the size (area) of the markers. This allows the visualization of three dimensions of data simultaneously on a two-dimensional plane, making it the correct choice for the described chart.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Heat map
Why it's wrong here
Heat maps use color intensity for a metric across two categories.
- ✗
Treemap
Why it's wrong here
Treemaps show hierarchical proportions using rectangles.
- ✓
Bubble chart
Why this is correct
Bubble charts are scatter plots with a third dimension represented by bubble size.
- ✗
Waterfall chart
Why it's wrong here
Waterfall charts show incremental changes.
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