Which pair represents a comparably essential part to a complete function as odometer is to distance?

Which pair represents a comparably essential part to a complete function as odometer is to distance?

• A. thermostat : temperature
• B. microscope : observation
• C. calculator : calculation
• D. scale : measurement

Answer: (C)

The relationship between an odometer and distance is that the odometer measures the distance traveled by a vehicle. For a complete function, we need a comparison where one element is essential for the measurement or assessment of the other.

In this case, the calculator is essential for performing calculations. A calculator is a tool specifically designed to carry out arithmetic operations, just as an odometer is designed to track distance. Without a calculator, one cannot perform calculations efficiently or effectively, just as without an odometer, one cannot determine distance traveled effectively.

The other options, while related, do not represent the same type of direct and necessary relationship. For example, while a thermostat is involved in temperature regulation (like measuring or controlling temperature), it does not quantify it the same way an odometer quantifies distance. Similarly, a microscope aids in the observation of small objects but does not directly measure observation itself. Lastly, although a scale is used for measurement, the relationship isn't as tightly functional as that of a calculator performing calculations.