If f(x) and g(x) are quadratic functions but (f + g)(x) produces the graph below, which statement must be true?

on a coordinate plane, a straight line with negative slope represents (f + g) (x). it goes through points (negative 3, 4), (0, 1), and (1, 0).
the leading coefficients of f(x) and g(x) are opposites.
the leading coefficients of f(x) and g(x) are opposite reciprocals.
the leading coefficients of f(x) and g(x) are the same.
the leading coefficients of f(x) and g(x) are reciprocals.