Essay

Reading Temperature Telemetry Graphs

You are working as an operations coordinator at a local cold-storage facility that uses automated sensors to track warehouse temperatures. The system produces daily performance graphs where time in hours (xx) is plotted on the horizontal axis and temperature (yy) is plotted on the vertical axis. Your manager asks you to write a brief training memo for a new technician, explaining how to find the domain of the temperature function from these graphs to ensure there are no gaps in the logged data.

In your memo, address the following three points:

  1. State which variable or axis on the graph corresponds to the domain.
  2. Describe the visual check (the vertical path check) used to test if a specific value is in the domain.
  3. Explain how to determine whether that specific value is mathematically included in the domain based on the outcome of your visual check.

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Updated 2026-06-17

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