Essay

Recalling and Extracting Domain and Range from Customer Spending Data

A business analyst is training a new intern on spreadsheet database structures. The intern is working with a customer dataset represented as a mathematical relation of ordered pairs, where each pair maps a Customer ID (xx) to their monthly spending in dollars (yy): {(101, 150), (102, 250), (103, 300)}. To help the intern understand how to categorize this information:

  1. Recall and state the definitions of the 'domain' and the 'range' of a relation.
  2. Describe the step-by-step procedure used to find the domain and the range from any given set of ordered pairs.
  3. Apply this procedure to identify the specific domain and range of the customer dataset provided.

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Updated 2026-06-18

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