https://www.desmos.com/calculator/nhwz1cctfa
I like this project, because it helped me to use the functions and understand the functions in quite interesting way. The way I used to figure out the equations was first sketch my card on the paper, then I found some example from Desmos.com. Also, I used my knowledge from the book. Domain and Rang need to try several times. The challenge for me is to use log funtions.