Which data visualization technique should be used to represent an important single metric on a dashboard?

Question

Options

• Aheatmap
• Bscatter pot
• Cgauge
• Dtreemap

• A
  9% (6)
• B
  6% (4)
• C
  83% (55)
• D
  2% (1)

Explanation

A gauge (option C) is purpose-built for displaying a single important metric - like speed, progress, or performance - using a dial or arc format that immediately communicates where a value stands relative to a defined range or threshold, making it ideal for dashboards.

Why the distractors are wrong:

• A. Heatmap - shows patterns across a two-dimensional matrix of data (e.g., activity across hours and days), not a single value.
• B. Scatter plot - visualizes the relationship or correlation between two variables across many data points; requires at least two metrics.
• D. Treemap - displays hierarchical, part-to-whole relationships across multiple categories using nested rectangles.

Memory tip: Think of a car dashboard - the speedometer is a gauge showing one critical metric at a glance. When the exam says "single important metric on a dashboard," picture that speedometer.

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