Shading Your Graph

You can use inequalities and restrictions to shade your graph, like this: https://www.desmos.com/calculator/mvcuf0mirs

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55 Comments

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    Camilla Greppi

    Does anyone know how to fill-in the hair? I want the hair to all be black and have no white inside.

    https://www.desmos.com/calculator/gvln8wmftx

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    Serge Ballif

    Camilla, You have to create inequalities (one piece at a time). For example, I have added a bit of shading in cell 3 of https://www.desmos.com/calculator/cstr9bkp6l for your graph. It's a tedious process, but the end result can be worth it.

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    Alan Parry

    To shade a region satisfied by multiple inequalities (such as for linear programming), plot the first inequality, then use the remaining inequalities as multiple domain restrictions.

    See https://www.desmos.com/calculator/ktled0miqy for an example.

    It does appear that desmos handles nonlinear domain restrictions with a little less finesse than linear ones, so I would suggest if you have a nonlinear inequality in your list, use that as the first one and the image will look better.

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    Per H. Christiansen
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    Colby Phillips

    I want to shade in the corner of a square, but only the part outside a circle with a radius of 10 units. the sides of the square are each 10 units.

    Please Help ASAP

     

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    Michael Fenton

    Hi Colby! You'll have to adjust the values to get the size you want, but you can try something like this: https://www.desmos.com/calculator/dqy55d231t

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    S013683

    How can i shade in the right wing?

    https://www.desmos.com/calculator/9nxw4ewfv6 

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    Serge Ballif

    S013683 - The link just opens the calculator. Perhaps it's the link to your individual worksheet, so it won't let anyone else open it. Use the share button to get a link to your graph that is shareable.

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    S013683
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    Serge Ballif

    S013683 - I still can't get the link to do anything other than take me to an empty calculator. Other links are working fine, so I'm stumped. All I can suggest is that you start replacing some of your equations that draw the right wing with inequalities. You might need to add extra restrictions to get the shading where you want it.

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    1000010483

    How would I change my inequalities to shade in my fourth section correctly? 

    https://www.desmos.com/calculator/opm7mffym9

    Edited by 1000010483
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    1000010483

    Please help ASAP

    Edited by 1000010483
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    Koala King

    How would I be able to shade in the mustache area on my graph. I've been trying for a good while now, but I just can't seem to figure it out.

     

    https://www.desmos.com/calculator/m6e1d1j1u4

     

    I tried using multiple inequalities, but the shading came out glitchy/incomplete. Any ideas?

     

    Edited by Koala King
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    Random 9th Grader

    So I asked my Geometry teacher and my parents but no one could figure out how to fill in the rest of the star. I have been stumped by this. Please try to only fill in the star.                                  https://www.desmos.com/calculator/h61x4iqux3

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    Serge Ballif

    Nice graph Random 9th Grader. You just need to use 4 more compound inequalities like you already did at the bottom of your list. Identify the formulas for the top and bottom curves of each region and try something like bottom < y < top. For example, here is one of the 4 you need.

    0.64x-1.15<y<-.64x-1.15\left\{-1.63<x<0\right\}  

    Just copy and paste that code into a cell to see the region. Note that I just took your formula for 2 of the lines to get that code. 

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    Jonathan Fry

    Here is another Linear Programming example with 7 vertices: https://www.desmos.com/calculator/evx7qcmams 

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    Ecstaticniya

    Hi,

       I was trying to shade the inner loop of a limacon. I did everything I know. But the inner loop is not completely been shaded.

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    Serge Ballif

    @Ecstaticniya You can try converting it to Cartesian coordinates. Here's an example. https://www.desmos.com/calculator/tnf1is3jw3

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    Ecstaticniya

    Hi,

       Thank you. I did it. <iframe src="https://www.desmos.com/calculator/u2ijzeobgb?embed" width="500px" height="500px" style="border: 1px solid #ccc" frameborder=0></iframe>

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    Tiger “Tigerwarrior13” Wang

    I'm trying to shade/colour my logo project, and since the lines are separate, how do I shade it? (Colouring in the corresponding folders: Outer lines, third outline)

     

    Here is the project: https://www.desmos.com/calculator/0fcknyk4jp

     

    Yes, I'm trying to shade it just like the original pic.

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    Serge Ballif

    Tigerwarrior13, You'll have to use inequalities such as "≤" instead of "=" for your curves. That also means you'll need to add many more restrictions to get what you want. There's no easy shortcut.

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    Lastknight655

    I have a parabola that has a shaded region on the right end of the graph. Two x intercepts are (-2,2) and the y intercept is -4.. The region shaded is on the left side of the right side of the graph by loo straight

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    Lastknight655

    What are the equation (s)
    Please anyone

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    Kendall Swider

    HI!!! I need help! I'm trying to shade certain things for my math project that is due tomorrow. I have a lot of lines that are part circle. am trying to figure how to shade between that part and another line, but I can't figure it out! Some examples are in the flower, the outer part of the sunglasses and the shading from the body to the sunglasses. Please help! 
    https://www.desmos.com/calculator/kwkkj4tpkg

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    Per H. Christiansen
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