"Rate of change is this mathematics known as Calculus. Calculus, it's a very interesting thing, is divided into two classes -- there's Differential Calculus and Integral Calculus. The Differential Calculus is in the first part of the textbook on Calculus, and Integral Calculus is in the second part of the textbook on Calculus. As you look through the book, you'll find in the early part of the book on Calculus, "dx" over "dy", a little "dx", and a little "dy" -- and one's above the other on a line -- predominates in the front part of the book, but as you get to the end of the book you find these "dx" and "dy"s preceded by a summation sign, or are equating to a summation sign, and the presence of this shows that we are in the field of Integral Calculus.
Now I hope you understand this, because I've never been able to make head nor tail of it. It must be some sort of a Black Magic operation, started out by the Luce cult -- some immoral people who are operating up in New York City, Rockefeller Plaza -- been thoroughly condemned by the whole society. Anyway, their rate-of-change theory -- I've never seen any use for that mathematics, by the way -- I love that mathematics, because it -- I asked an engineer, one time, who was in his 6th year of engineering, if he'd ever used Calculus, and he told me yeah, once, once I did, he said. When did you use it? And he said I used it once. Let me see, what did you use it on? Oh yeah. Something on the rate-of-change of steam particles in boilers. And then we went out and tested it and found the answer was wrong.
And another bad math joke. Actually. It isn't even a joke because it's not technically funny. (Okay, "technically" funny maybe, but not funny - you know what I mean). Courtesy of xkcd (NSFW!) [There was actually a funnier vectors one that I wanted to post but its NSFW. It's somewhere on the site)
