graph help

The hard part here is selecting the correct graph

f(x) is the parabola  ....it is the same in both graphs

g(x)   =    sqrt (x) - 1

Note that when x = 0, y = -1

So.... (0, -1) is on the graph of g(x)

So.... the bottom graph is correct

The intersection  occurs at x = 4....so....this is the solution