The point A after reflection over the line y = 1 becomes A' (-3,3).
What is reflection?
Reflection is the transformation which produces a mirror image of an object. The mirror image can be either about any line.
In our question,
The object is a triangle ∠ABC and the line is y=1.
Point A before reflection (equation 1):
A = (-3,-1)
After reflection, the point is shifted along y axis and x remains constant.
Reflection about y=1 of point A:
A ⇔ A'
( x, y) ⇔ ( x, y+4)'
Put the values of x and y using equation 1.
(-3, -1) ⇔ ( -3, -1+4)'
(-3, -1) ⇔ (-3, -1) ⇔ ( -3, -1+4)'
Hence the point A will transform to the point A' (-3, 3) after reflecting about y=1.
To learn more about reflection, refer to the link:
https://brainly.com/question/15487308
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