Which of the following is the rule for rotating the point with coordinates (x,y), 180° clockwise about the origin?

  A.  (x, y) ⇒ (-x, -y)

Step-by-step explanation:

Rotation 180° in either direction is equivalent to reflection across the origin, and/or reflection across both axes (in either order). It negates both coordinates.

  (x, y) ⇒ (-x, -y) . . . . rotation 180°

Emilias inequality, x<6 is correct because the number of hours is less than it equal to 6. Emilias number line is correct. The endpoint is correctly filled in and the number line should be shaded to the left of the endpoint.