Mathematics

The reflection of the point P(1, -2) in the line y = -1 is

  1. (-3, -2)

  2. (1, -4)

  3. (1, 4)

  4. (1, 0)

Reflection

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Answer

We know that the reflection of the point (x, y) in the line y = a is the point (x, -y + 2a).

∴ The image of the point P(1, -2) under reflection in the line y = -1 is the point (1, -(-2) + 2 × (-1)) i.e the point (1, 0).

Hence, Option 4 is the correct option.

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