This is a pen project I created using lines and a tad bit of basic calculus equations (namely f(x)=dx+epsilon). I had the derivative calculated (rate of change) and the integration (area per d/1th of an x) calculated.
This was me and a book called SCIENCIA that explains calculus in a page (no, you don't need an entire year of it). Wow, people seem to like this. Thanks for the loves and the favorites and for curating it and whatnot. Necessary hashtags: #ElevenAndLearningCalculus #Didn'tTakeScriptsFrom@PeaBrainProgram