The linear parent function, f(x)=x ,was transformed to create a graph g(x)=−f(x). Which statement about the graph is true?

The graph of f is reflected over the x-axis to create the graph of g.

The graph of f is shifted 1 unit down to create the graph of g.

The graph of f is shifted 1 unit left to create the graph of g.

The graph of f is shifted 1 unit right to create the graph of g.