Algebra-2

Question Analysis
This question tests the student's understanding of horizontal stretching and its effect on the function. The key is to recognize that a horizontal stretch by a factor of 3 means that the input variable is multiplied by .

Key Concept Explanation
Horizontal stretching by a factor of 3 means that the graph of the function becomes wider.

Step-by-step Solution
1. Identify the parent function:
2. Apply the horizontal stretch by a factor of 3:

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