Circle Area is \(\pi r^2\) using:
– Pizza Slices
– Concentric Circle Slices
graph match - big derivative puzzle
The idea is to look at the properties of amount functions (e.g. \(f(x)\)) and their rate functions (the derivative functions, e.g. \(f'(x)\)).
A note on the puzzle:
You can make the puzzle task more interesting by scrolling the browser to hide the true/false hints.
Building a rate function Using the slope of tangents
Take a look at Demos Graphing Calculator which runs on computers, smart phones, and tablets, to be very useful. Start by trying it on a computer. You can save your work if you click sign-in 
in the upper left hand corner of the window.
Work through this brief introduction to graphing functions in Desmos.
