Final answer:
The meaning of the expression 'DO, 2 of X' is unclear in the given context.
Step-by-step explanation:
The given question is asking about the meaning of the expression 'DO, 2 of X' given the coordinate pairs (2, -2), (4, 0), and (8, 0). However, the expression 'DO, 2 of X' does not have a clear meaning in the context provided. It is important to note that without additional information or context, it is difficult to determine the specific subject or concept being referred to in this question.