Comments on: 11 Desmos Challenges: Restrictions (#7)

By: Seth

Seth — Sun, 05 Jun 2016 12:19:10 +0000

Hi Michael. Both options are definitely helpful to see, but especially the first since I couldn’t quite figure out how to input those additional restrictions. Of course the second option is clearly preferred if restrictions aren’t needed. Thanks so much for your quick reply!

By: Michael Fenton

Michael Fenton — Fri, 03 Jun 2016 22:12:41 +0000

Hi Seth. Thanks for stopping by. Here’s an idea for solving that issue: https://www.desmos.com/calculator/iklvo9mcc7

That strikes me as a little clunky and tedious, but it does the trick, and keeps restrictions in the mix.

Here’s how I would probably build that graph now if I wasn’t concerned about using restrictions: https://www.desmos.com/calculator/fyl98rofbn

Let me know if either of those help!

By: Seth

Seth — Fri, 03 Jun 2016 06:23:47 +0000

Hey! I’m loving this tutorial you’ve put together. I was working on the advanced level above and noticed that there are values where if the slider is dragged to them, the line disappears, in both the one I created and on your solutions page, even though I defined my functions a bit differently than yours. Upon investigation, I believe this is happening due to the slope having a denominator of zero when the x values in the denominator are the same on the sliders. Is there any sort of workaround with Desmos to say something to the effect of “when the denominator of the slope=0 (e.g. when x2-x1=0), graph x=x1 between y1 and y2 instead?