Question

Below is the graph of f(x)= 2in(x) how would you describe the graph of g(x) = 4in(x)?

Answer 1

The amplitude of 4 ln x is always exactly twice the amplitude of 2 ln x.  

Please note:  You refer to a graph, but you have not shared this graph.  
Also please note:  The abbreviation for "natural logarithm" is ln x, not in(x).

"ln" stands for logarithm (natural).