Can you be more specific about what you mean by change?
You are being very unclear about what you mean. Give the question in full and show what you tried already. I can only guess you are talking about a Fourier transform or a Laplace transform but you probably mean something entirely different because this is in Pre-University.
Going from x to x- 2 is a shift along the x-axis to the right, two places (x- 2= 0 when x= 2 so what used to be x= 0 has shifted to x= 2).
I'm not sure I would consider going from to a "functional transformation" in the usual sense of these problems (If it were , that would be a "stretch" by 3 times in the y direction) but it is, of course y to the 2/3 power: .