Given f(2) = 12, which of the following could be an equation of the function?






A.


f(x) = 8x _ 2




B.


f(x) = 4x + 4




C.


f(x) = 6x _ 4




D.


f(x) = _4x _ 4

Respuesta :

the answer could be B
For this problem, just substitute the value of x and see if it results the same value.
A. f(2) = 8(2) - 2 = 14   ... xB. f(2) = 4(2) + 4 = 12   ... C. f(2) = 6(2) - 4 = 8    ... xD. f(2) = -4(2) - 4 = -12 ... x
Thus, D.


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