Constants
An apology letter from differentiation to constants (whose derivative is zero), with a sulky letter C praising integration's '+C'.
Use this cartoon
Free for classrooms, worksheets, slides and other non-commercial use under CC BY-NC 4.0, with credit to Ben Orlin.
Cartoon by Ben Orlin, Math with Bad Drawings. https://cartoons.mathwithbaddrawings.com/2017-04-11-constants/ (CC BY-NC 4.0)Transcript
"Dear Constants, I'm so sorry. All these years I've treated you like nothing. — Differentiation"
The letter C: "Your evil twin Integration takes us everywhere. So much more considerate."