quadratic function f is given f x x 14x 35 a Express fin standard form f x b Sketch a graph of f 60 40 20 O 60 40 20 y 60 40 20 20 40 60 y 60 40 20 20 40 60 20 Is this a maximum or minimum value O maximum value minimum value 20 c Find the maximum or minimum value of f f x 40 40 60 60 X X 60 40 60 40 20 20 20 40 60 40 20 40 20 60 20 60 40 60 y y