Describe fully the single transformation which takes shape A to shape B

Answer:
(See explanation for further details).
Step-by-step explanation:
The transformation consists of two steps:
1) Reflection of A with respect to vertical axis.
2) Translation of the resultant shape by 1 unit in the -y direction.
We want to describe the transformation that takes shape A to shape B.
The transformation is: A reflection across the y-axis followed by a translation down of 1 unit.
By looking at the graph, we can notice two thins:
The "hole" in shape A is at the right, while the hole in shape B is at the left, and both of these are at the same distance of the y-axis. So we can conclude that we had a reflection across the y-axis.
We can also see that shape B is below shape A (only one unit). Then we also had a vertical shift of one unit down.
Then the complete transformation is:
A reflection across the y-axis followed by a translation down of 1 unit.
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