Algebra-2

Question Analysis
The question tests the student's ability to determine whether a given mapping diagram represents a function. The key is to check if each input value (domain) points to only one output value (range).

Key Concept Explanation
A function is a special type of relation where each element in the domain (input values) corresponds to exactly one element in the range (output values). If any input value points to more than one output value, then the relation is not a function.

Step-by-step Solution
1. List the inputs: 4, 5, 6
2. Check if each input value points to exactly one output value:
For input 4,...