Which are cubic functions? Check all that apply.f(x) = –4 – 2x + 5x3f(x) = –3x – 1f(x) = –x2 + 5x – x3f(x) = x2 – 6x3 + 2x4 + 1f(x) = 2x3 + 3x2 – x – 3f(x) = 3x2 – 1 – 8x

A cubic function is a polynomial whose highest power of x is 3. In A, C, and E, the highest power is x³, and each has a nonzero coefficient for that term. D is degree 4, while B and F have highest power 1 and 2, respectively.

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