How to Find the Equation of a Line and the Gradient Using a CASIO FX-991EX CLASSWIZ - YouTube
Got ahold of a Casio fx-991ex and CG-50 to match my Classpad II. I'm really impressed with them but there is something about the fx-991ex... (see comments) : r/calculators
Casio FX-991EX Classwiz Non-Programmable Scientific Calculator, 552 Functions with Menu Driven Interface, Black : Amazon.in: Office Products
Scientific vs. Graphing Calculator – Which One?? – Blog: Strategies, Resources, & EdTech Tips
Plotting/ Creating Tables from equations using Casio FX 991EX - YouTube
Found this incredible function on my Fx991EX if you press shift and Option button on left corner it creates a QR code that can be scanned with a phone to see graphing
fx-991EX Graphing the Absolute Value Function w/A Scientific Calculator - YouTube
fx-991EX: Tables, Statistics, Regression and Visualization QR Code - YouTube
Show a Trigonometry Graph transformation on your mobile device via QR codes fx-991EX Casio Classwiz - YouTube