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Which of the following points is symmetric with y=x at (-1,-

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by Max@Math Revolution » Wed Aug 24, 2016 6:20 pm
Which of the following points is symmetric with y=x at (-1,-2)?
A. (-2,-1)
B. (-2,1)
C. (2,1)
D. (-1,-2)
E. (-1,2)

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by Max@Math Revolution » Sat Aug 27, 2016 4:22 am
If the point is symmetric to y=x, we can put y-value to x coordinates and put x-value into y coordinates. Then we get (-1, -2) --> (-2, -1). Hence, the correct answer is A.
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