Final answer:
The '-' symbol in the algebraic representation (-y, x) signifies negation or the negative sign, indicating the value is the opposite of its positive counterpart.
Step-by-step explanation:
In the algebraic representation (-y, x), the "-" symbol represents negation or the negative sign. Therefore, the correct answer to the question is C) It represents negation or the negative sign. When you see a negative sign in front of a variable or number, it indicates the value is the opposite of its positive counterpart.
For example, when subtracting vectors, such as vector A minus vector B (A - B), you're essentially adding the opposite of vector B, denoted as -B, to vector A (A + (-B)). This principle applies to all operations: subtraction is the addition of a negative, and multiplying a negative by a positive results in a negative number.