Algebra-2

Question Analysis
The question tests the understanding of the definition of a function. A relation is a function if each input value (x-value) corresponds to exactly one output value (y-value).

Key Concept Explanation
A function requires that each x-value in the domain corresponds to only one y-value. This means there should be no duplicate x-values with different y-values.

Step-by-step Solution
1. List the given ordered pairs: {(4, 9), (4, 11), (6, 13)}.
2. Check for any duplicate x-values: 4 appears tw...