The correct statement is:
If (x,y) is on the graph of f(x), then (−x,y) is on the graph of f(−x).
This statement describes the property of the function f(−x) in relation to the function f(x). If (x,y) is a point on the graph of f(x), meaning y = f(x), then (−x, y) will be on the graph of f(−x), meaning y = f(−x). Thus, the output remains the same for the corresponding negative input.