The point S (-1,-3) is reflected across the line y=-2

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Explanation:

Refer to the diagram below.

The point S(-1,-3) is exactly 1 unit below the line y = -2.

Move up 1 unit to go from S to a point on the line, and directly above S.

Then move another unit up to arrive at S ' (-1, -1) which is the result of reflecting point S(-1,-3) over the line y = -2.

Both S and S' are the same distance away from the mirror line y = -2.

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