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Second Year maths · K.2 · Transformations

Reflect a point in the x-axis or y-axis

Reflecting in the x-axis changes the sign of y. In the y-axis it changes the sign of x. In the line y = x it swaps x and y.

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  1. Apply a reflection in the y-axis to the point (3, 7). What are the coordinates of the image?

    Answer: (-3, 7)

  2. Apply a reflection in the y-axis to the point (6, −2). What are the coordinates of the image?

    Answer: (-6, -2)

  3. Apply a reflection in the y-axis to the point (−6, −7). What are the coordinates of the image?

    Answer: (6, -7)

Tip: Reflecting in the x-axis changes the sign of y. In the y-axis it changes the sign of x. In the line y = x it swaps x and y.

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