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Answer:
(x, y) ⇒ (x +(-1), y +(-1))
Explanation:
Reflection over the y-axis is the transformation ...
(x, y) ⇒ (-x, y)
After that reflection, the figure is translated left 1 and down 1. That transformation is ...
(x, y) ⇒ (x -1, y -1)
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Additional comment
The composition of the two transformations is ...
(x, y) ⇒( -x -1, y -1)