関連ワード:  how to graph a function f x    how to graph a function of x    how to graph y as a function of x    how to sketch the graph of a function f x    how to graph f of x    how to graph a function with x 3    how to graph f x 2    how to graph f x 3    how to graph f x )= 3x 2    how to graph f x )= 2x 2