[size=100][color=#1e84cc][b]Activity to visualize the different ways of representing intervals / rays:[/b][list][*]visual representation on the number line[/*][*]in set notation (i.e. as an inequality)[br][/*][*][size=100][color=#1e84cc]in interval notation[/color][/size][/*][/list][/color][b][color=#a64d79]Objects that can be changed in the activity:[/color][br][/b][list][*][size=100]You can click to change between an interval (bounded on both ends) to a ray (bounded on one end)[/size][/*][*]You can shift the endpoints of your interval/ray[/*][*]You can click on the endpoints to change whether they are not included in the interval (open circle) or included in the interval (closed circle)[/*][*]The red point X is any point on the interval/ray; you can move it to change the direction of the ray (left of the endpoint or right of the endpoint).[/*][/list][/size]Translated into English from the original activity "Intervalos y semirrectas" by [url=https://www.geogebra.org/u/deborapereiro]Débora Pereiro Carbajo[/url]