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Let f be a function such that f(x) = f(-x) for all real numbers x. If the point (-2, 4) lies on the graph of y = f(x) in the xy-plane, which of the following points must also lie on the graph of y = f(x)?

The model for the frog population was given by the function F(m)=m+6, and the model for the turtle population was given by the function T(m)=m^2+3/m+1. Which of the following expressions defines the function F(m)-T(m), the difference in size between the two populations m months after the initial count?