Answer:
y-axis
Step-by-step explanation:
Given:
- Point D(9, -8) and D' (9, 8).
Identify if it reflects across the x-axis or y-axis.
In this case, the y-coordinate of Point D changed from -8 to 8, while the x-coordinate remained the same at 9.
So, the line of reflection is the y-axis.
