A logistics coordinator at a distribution center is reviewing a data log that maps specific loading dock numbers to the temperature variations recorded at those docks. The log contains the following relation of (dock number, temperature variation) pairs: $\{(8, -4), (4, -2), (2, -1), (0, 0), (2, 1), (4, 2), (8, 4)\}$. Recalling the mathematical definition of a function, why does this data log fail to represent a function?

In a warehouse inventory database, a technician finds the following relation of (Shelf ID, Bin ID) pairs: $\{(8, -4), (4, -2), (2, -1), (0, 0), (2, 1), (4, 2), (8, 4)\}$. To confirm that this relation is not a function, the technician notes that the input Shelf ID 4 is paired with two different Bin IDs: -2 and ____.

A logistics coordinator tracks the relationship between 'Warehouse Zone IDs' ($x$) and 'Daily Stock Adjustments' ($y$) using the following relation: $\{(8, -4), (4, -2), (2, -1), (0, 0), (2, 1), (4, 2), (8, 4)\}$. True or False: According to the mathematical definition of a function, this relation represents a function.

A systems analyst is auditing a data log that maps 'Department IDs' ($x$) to 'Access Authorization Codes' ($y$). The relation is defined as: $\{(8, -4), (4, -2), (2, -1), (0, 0), (2, 1), (4, 2), (8, 4)\}$. To verify if this mapping represents a mathematical function, match each Department ID ($x$) with the correct observation regarding its paired Authorization Codes ($y$).

Maintenance Log Audit: Data Consistency