Which describes the difference between the graph of f(x) = 3x2 + 2 and g(x) = 9x2? b) the graph of f(x) is obtained by shifting g(x) up 2 units and compressing vertically by a factor of 3. c) the graph of g(x) is obtained by shifting f(x) right 2 units and stretching vertically by a factor of 3. d) the graph of f(x) is obtained by shifting g(x) right 2 units and stretching vertically by a factor of 3.