https://www.gregmat.com/quizzes/quiz/gre-mini-exam-1
If a=b then (a,b) lies on the line y=x right? How is it getting reflected across it then?
Two points can coincide.
This question feels kinda unfair. But I guess ETS will also test our concepts in a similar manner?
I don’t see the unfairness in the question - a point can reflect to itself.
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