The function f is defined by f x = - 3 x + 60 . What is the value of

Question

The function f is defined by f x = - 3 x + 60 . What is the value of f x when x = - 8 ?

Accepted Answer

Choice D is correct. The value of f x when x = - 8 can be found by substituting - 8 for x in the given function. This yields f - 8 = - 3 - 8 + 60 , or f - 8 = 84 . Therefore, when x = - 8 , the value of f x is 84 . Choice A is incorrect. This is the value of - 3 + - 8 + 60 , not - 3 - 8 + 60 . Choice B is incorrect. This is the value of - 8 + 60 , not - 3 - 8 + 60 . Choice C is incorrect. This is the value of - 3 + 60 , not - 3 - 8 + 60 .

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