actions is an ability of desmos providing interactivity with graphs. the primary usage of actions is to change variables’ values.

enabling actions

by default, you can’t add actions to your graph. if you need to add actions to your work, go to your account settings and enable them. this will allow you to use actions and the ticker.

usage

the simplest action syntax is this: \(\text{variable}\to\text{value}\). to type the right arrow, type -> (minus and greater-than). desmos will understand that and automatically convert it to the right character.

when you type an action into the expression bar, you’ll see a “->” button. clicking it will execute your action. the example above sets a variable to a new value.

exercise 1: how do you set the variable \(d\) to \(5\)? answer: to do that, you type “$d \to 5$”.
exercise 2: how do you divide the variable \(f\) by \(3\)? answer: to do that, you type “$f\to\frac{f}{3}$”.