Final answer:
A table specifies a function if each input value is paired with exactly one output value.
Step-by-step explanation:
The table specifies a function if each input value (x-value) in the left column is paired with exactly one output value (y-value) in the right column.
To determine if the table specifies a function, we need to check if any input value is repeated or if any output value is missing.
If there are no repeated input values and every input value has a corresponding output value, then the table specifies a function.