You can use this to visualise the domain and range for different functions.[br][color=#c51414] domain = set of input (x) values[br][color=#0a971e] range = set of output (y) values[br][color=#1551b5]Instructions for use: Type in a function of your choice in the f(x)= box, and then experiment by moving points A and B along the x axis.[br]Enjoy!