DA0-002 Visualization and Reporting Practice Question
A dashboard designer is creating a sales performance dashboard and wants to minimize non-data ink to improve clarity. Which action best follows the principle of maximizing the data-ink ratio?
⚠ Common exam trap
Many candidates confuse 'visually appealing' (options B, C, D) with effective data communication, not realizing that decorative elements reduce the data-ink ratio and can obscure insights in a professional dashboard.
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
✓
Removing gridlines that do not add value to the chart
It directly follows Tufte's data-ink ratio principle by removing non-data ink (gridlines that don't aid interpretation) while preserving the core data. This maximizes the proportion of ink devoted to actual sales metrics, improving clarity without sacrificing information.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Removing gridlines that do not add value to the chart
Why this is correct
Gridlines are non-data ink: they consume pixels without encoding values. Removing those that add no interpretive value raises the data-ink ratio, letting the plotted data dominate the chart and improving clarity, exactly as the principle requires.
- ✗
Including a detailed company logo on every chart
Why it's wrong here
A logo adds pixels that encode no data, lowering the data-ink ratio rather than raising it. Logos serve branding and identification on executive-facing or externally published dashboards, where corporate identity is a deliberate requirement, not clarity of the plotted values.
- ✗
Adding a background image to make the dashboard more visually appealing
Why it's wrong here
A background image contributes decorative pixels unrelated to the plotted values, reducing the data-ink ratio. Backgrounds suit themed or presentation-oriented dashboards where visual identity is prioritised, not analytical dashboards whose purpose is rapid, accurate comparison of sales figures.
- ✗
Using 3-D effects on bars to make them stand out
Why it's wrong here
3-D effects add shading, depth and perspective, which are non-data ink that encodes no sales value and can distort bar length perception. They are tempting because they draw attention to key bars, but emphasis is properly achieved through colour or position; 3-D styling suits decorative marketing slides, not analytical dashboards.
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