Final answer:
Neither the reflection over the y-axis nor the 270° counterclockwise rotation would map figure ACB onto itself.
Step-by-step explanation:
To determine whether a reflection over the y-axis and a 270° counterclockwise rotation would map figure ACB onto itself, we need to analyze the effects of these transformations.
- A reflection over the y-axis would change the x-coordinates of the points, but not the y-coordinates. So, figure ACB would not be mapped onto itself after a reflection over the y-axis.
- A 270° counterclockwise rotation would change the position of the points by rotating them around the origin. After a 270° counterclockwise rotation, figure ACB would not be mapped onto itself as the shape and position of the points would change.
Therefore, neither the reflection over the y-axis nor the 270° counterclockwise rotation would map figure ACB onto itself.