Suppose (2,-3) is on the graph of y = f(x). Find the point on the graph of the given transformation function.

The textbook is given me the following function: y=f((72x)/4). My question is, why is the outcome (-1/2,-3)?

I know that the point on y axis moves to the left with adding and to the right by subtracting, but what happens with the example above?

Can someone provide the step by step solution?

Thank you