Answer:
The correct option is C.
Explanation:
The given function is

From the given graph it is clear that the vertex of f(x) and g(x) are same, i.e.,(0,0). But the graph of g(x) compressed vertically.

If k>1, then graph of g(x) stretched vertically and if k<1, then graph of g(x) compressed vertically.

The graph of g(x) passing through the point (2,2).



The value of k is 1/2. The function g(x) is

Therefore, option C is correct.