Question

Which is the graph of f(x)= square root of x

Answer 1

The bottom graph is the graph for the sqrt(x)!

Answer 2

f (x) = root (x)
For this case what you must do is build a table with the values that the function takes when inserting a value of x.
We have then:
x f (x)
1 1
4 2
16 4
25 5
36 6
When you get a sufficient number of points, graph each orderly and see the behavior of the graph.
Answer:
The graph looks like in the attached image.