Difficulty: Easy
Correct Answer: scale : weight
Explanation:
Introduction / Context:An odometer is a device that measures distance traveled. We must choose the option where the first item is an instrument and the second is what it measures, preserving the device-to-quantity relationship.
Given Data / Assumptions:
Concept / Approach:
Step-by-Step Solution:
1) Confirm relationship: odometer : distance.2) 'scale : weight' — a scale measures weight (or mass by calibration); matches pattern.3) 'length : width' — two dimensions; not instrument-to-measurement.4) 'inch : foot' — units, not instruments.5) 'mileage : speed' — two quantities; not device-to-quantity.6) 'area : size' — general quantities; lacks device.Verification / Alternative check:
Instrument test: Both odometer and scale are tools whose primary function is to measure specific quantities.Why Other Options Are Wrong:
length : width — attributes, not measurement by device.inch : foot — measurement units.mileage : speed — different metrics, no instrument.area : size — broad terms; missing instrument.Common Pitfalls:
Confusing units with instruments. The analogy requires a tool mapped to its measured property.Final Answer:
scale : weight
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