Earlier this week I made a log transformations activity using Desmos Activity Builder. You can find it here (I also submitted it to the Desmos Bank). I made it for my MHF4U students (that's grade 12 Advanced Functions) who, at this point, should understand function transformations inside and out. I greatly appreciate the feedback I received from Kara Gilby, @sheriwalker72, and my students. If you try this activity with you class, please let me know how it went and anything you think would make it better. Thanks!