To take the quizzes, you must log in.Username: student Password: Formulas.1
You can view this site inthe language of your choice.
Open an account (free) at https://www.geogebra.org/ in order to create and save your own graphs. You can then insert them into a Formulas question using the <iframe> tag.
The GeoGebra graph below is from https://www.geogebra.org/materials (https://www.geogebra.org/m/pqr2wj5D).
Edit the function, move the blue dot or the green dot: