The input values of x = {2, 3, 4, 5} result in output values of f(x) = {4, 6, 8, 10}. Note that each of the values of x and f(x) line up (e.g., when x = 2, f(x) = 4). What function represents this relationship?
A) f(x) = 2
B) f(x) = -3x
C) f(x) = 2x
D) f(x) = -3x
E) f(x) = x + 5
