Which of the following mathematical symbols represents "the opposite of"?

the minus sign

Step-by-step explanation:

In mathematics, the symbol for the additive opposite is the minus sign

The symbol for the multiplicative opposite is the inverse operation 1/x (I think)

So, yes, specific opposites have symbols, BUT ...

Just saying "the opposite of" is too blurry to find one word that represents that.

Answer: negative sign

Step-by-step explanation:

-8x-8=64

Opposite of a negative is a positive

That's why a negative times a negative is s positive