The parent equation of the given graph is [tex]y=\sqrt[n]{x}[/tex]
where, n is any even number.
When this function is vertically shifted ( vertical dilation) down in the y- axis,
we get a graph similar to the one given in the question.
For example: [tex]y=\sqrt[2]{x}-2[/tex]
The graph of the above function is attached below.
