# MichMATYC Friday Workshop

NOT BASEBALL

We learned about Desmos- especially its use in formal and informal assessment today. The session would probably help beginners more but there were small things everyone could learn and some discussion of Desmos activities and

Some small things I learned:

Shift click can can change the scale on just one axis.
The home button is analogous to ZOOM 6 in TI-speak.

~can be used for regression- in various ways.
The circled plus by a table is analogous to ZOOM STAT

Desmos also now supports statistics and random number generation. random(n) is a command that creates n random numbers between 0 and 1. I figured I could then use B = floor(6rand(500))+1 to roll 500 six sided dice and B =floor(6rand(500)) + floor(6*rand(500)) + 2 to roll 500 pairs of dice and sdave them to a list. Then I set about building a histogram. To make the window update I had to go into what Desmos calls its computational layer within the Activities. I figured while there I could let the number of dice vary.

At student.desmos.com you can try an activity I designed (it needs a bit of clean up for prime time) to create a histogram. Use code WFJXRQ. I still need to figure out how to enter a default value for the user input and how to limit the user input since the lists Desmos uses for the random dice have a limited length.

Here is the dice histogram maker outside Desmos Activities so you can dig into the code and commands if you want.

Activities could include creating a function to match a transformation of a function, finding graphs to match a given polynomial, regressions of various sorts in Math 131, and creating histograms for random events for Math 131. These could take place either in or out of Desmos Activities.