The image of a point after a reflection over the line y = –x is (7, –1). Find the coordinates of the preimage.

1 answer

ummh, doesn't it say the y is the opposite of the x ?
(and the x is the opposite of the y ?)

so (7,-1) ----> (1, -7)

check:
plot the points and see how they relate to the line y = -x
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