3 Function notation and meaning If you are given a context and a function in a table graph or equation you can explain what f 3 means and f x 3 means You can also evaluate f 3 and solve for x when f x 3 Example If the number of forks y used at a restaurant is a function of the number of customers x we can use the notation y f x What would be the meaning of each of these equations or expressions in words A f 23 37 B f x x C f 151 9 D f x 2x 9