Any time you have free variables in an expression, the calculator will offer to let you define them with sliders. You will see the option to add sliders appear in the expression bar once you finish typing in your equation. 

You can also use the same variables in several expressions to plot curves that will change together. 

In this example, the value of c defines two parallel lines that move up and down together.

In this example, the two lines stay perpendicular to each other for any value of m.

To adjust the limits and interval of your slider, click either of the values at the ends of the slider bar. Input your values and click "set to complete the adjustment.



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  • 0
    Tom Kenyon

    I like that the play button moves the sliders forward and backward.   And, I like that you can click the --> <--- button to change it to ---> --->  (above one another) so that the slider only plays forward.   But, I make a lot of physics models.  My most common slider is for time.   I wish there was a way for it to simply play once, and not repeat.  (Is there?)

  • 0
    Jake Lowry

    Is it possibe to change the bounds of the graph wondow using a variable defined with a slider. Ex. As a in the function ax^3 gets larger have the left and right bounds of the graph window shift to stay fixed on te graph of ax^3.

  • 0
    Joshua Luke Himmelsbach

    I have created a linear regression exploration that uses lots of data points that can be dragged around. I would like to be able to 'reset' the points to their initial position. In other words, a way to define a 'default' value for any slider variable, and make it easy (one-click) to return that slider to its default without having to actually slide it. Is there a way to do this for a single slider? How about for all sliders at once?

  • 0
    Render Ford

    Is there a way to make it so that the slider animation or movement has only a certain amount of repetitions? For example I am making a smiley face with eyebrows and I only want the eyebrows to move up and down 2 times, like he is looking at a girl or something. Is that possible? I think that would be helpful for people doing desmos art.

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