Answer: The answer is (B) vertical translation of 10 units.
Step-by-step explanation: We are to select the correct transformations that will map figure H onto figure H'.
We can see from the graph that if the figure H is translated vertically downwards by 10 units, then the new figure will coincide with the figure H'.
So, vertical translation of 10 units will be the correct transformation.
The other three translations - reflection across the y-axis, vertical translation of 15 units and reflection across the x-axis will not map figure H onto figure H'.
Thus, (B) is the correct option.
