The function is y = -√x + 2, this is a reflection over the x-axis followed by a translation of 2 units up.
Which is the transformation?
We know that the graph is a transformation of the parent function y=√x.
First, notice that the function is inverted vertically, so we have a reflection over the x-axis, which means that we must have:
y = -√x
Also, notice that when x =0, the function has a value of 2, so we also have a translation of 2 units up, then the function in the graph is:
y = -√x + 2