Question: Alex says that the function f ( x ) = (3 x )2 represents a vertical stretch of the quadratic parent function by a factor

Alex says that the function f(x) = (3x)2 represents a vertical stretch of the quadratic parent function by a factor of 3. Marta says that it represents a horizontal compression by a factor of . Decide whether one student is correct, both are correct, or neither is correct.

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