3 Consider the function f x 2x 3x 6 x 2 A Find f x Show your work B Graph f x on your calculator and use this graph to answer the following questions On what interval s is f x concave up and how did you use the graph of f x to estimate On what interval s is f x concave down and how did you use the graph of f x to estima this Note You don t need to include a sketch of y f x in your answer