Which of the following is the value of a when the function f of x is equal to 3 absolute value of x is written in the standard form of an absolute value function?

The standard form of an absolute value function is f(x) = a|x − h| + k, where a is the coefficient multiplying the absolute value. In f(x) = 3|x|, that coefficient is 3, so a = 3. The correct choice is 3.

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