If f'(x) and g'(x) exist and f'(x)> g'(x) for all real x, then the graph of y = f(x) and the graph of y = g(x) (A) intersect exactly once. (B) intersect no more than once. (C) do not intersect. (D) could intersect more than once. (E) have a common tangent at each point of intersection. 6. If y is a function of x such that y'>0 for all x and y" <0 for all x, which of the following could be part of the graph of y = f(x)? (A) (C) (D) ups (B) * (E) #F 7. The graph of y=5x-x has a point of inflection at (A) (0,0) only X (B) (3,162) only (C) (4,256) only (D) (0,0) and (3,162) (E) (0,0) and (4,256)