Polar Graphing on Desmos
I wanted to demonstrate polar graphing on Desmos to my class. When you graph a polar equation in Desmos the domain is preset at 0 < Theta < 12 pi . This takes care of most graphs, but it doesn’t allow students to see how they are being graphed. I created this Desmos graph to show how all the points are graphed to create a polar graph and also for them to be able to investigate what domain will trace each function once.
https://www.desmos.com/calculator/zpzkzuxfvu
Enjoy!
To Accumulate a Rate --- Integrate! 
Very good. You addressed a problem I didn’t even recognize. Thank you.