Which of the following pairs of points is a reflection of each other across the x-axis?

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1 point
(1,17) and (1,-17)
(8,1) an (1,8)
(-6,-10) and (6,-10)
(13,-11) and (-13,11)

The pair of points that is a reflection of each other across the x-axis is (13,-11) and (-13,11).