The image of the triangle ABC and the reflection is attached
What is reflection over al line
A reflection over a line is a transformation in which each point of a figure is mapped to its mirror image with respect to the given line (x = -3).
This line (x = -3) is called the line of reflection.
In this transformation, the distance of each point from the line of reflection remains the same, but the direction is reversed, creating a mirror image.
The reflected image is labeled A'B'C'