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Home > CC4 > Chapter 7 > Lesson 7.1.4 > Problem 7-51

7-51.
  1. Multiple Choice: The point A(–2, 5) is rotated 90° counterclockwise (↺) about the origin. What are the new coordinates of point A′? 7-51 HW eTool (Desmos). Homework Help ✎

    1. (2, 5)

    2. (5, –2)

    3. (2, –5)

    4. (–5, –2)

When you rotate counterclockwise (x, y) → (−y, x).

(d)

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