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# Which of the following is the scaling factor a of the function f(x)=3|x|? A. -1 B. -3 C. 1 D. 3

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The scale factor of the given function, f(x) = 3|x| is equal to 3. This is evident because the equation suggests that what is the absolute value of x in the equation is multiplied only by 3, and then we determine the value of and. The answer to this question is letter D. 3.