Press the Play button in the bottom left corner to activate point A. Point A will then oscillate along the x-axis.[br]Point B will follow the elements in the domain. The restricted domain will be the interval highlighted in red.[br]Point C will follow the elements in the range. The range will be the interval highlighted in blue.[br][br]It is also possible to change the function. If you scroll in or out then that will erase the highlights.

Did you zoom out and find the same domain?[br]When you zoomed out did you find the same range?[br]What happened when you changed the function?