The point (2, –4) is reflected across the line y = –1. What are the coordinates of the image?

A reflection across the horizontal line y = −1 keeps the x-coordinate unchanged. The point’s y-coordinate, −4, is 3 units below the line, so its image is 3 units above it: −1 + 3 = 2. The image is (2, 2), choice C.

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