A graphing calculator is a handheld device that lets you plot graphs, solve simultaneous equations and perform complex calculations with variables. It has a large screen that can show multiple lines of text and images. It is a popular option for high school and post-secondary school students learning STEM subjects (science, technology, engineering and math).

To use a graphing calculator like a TI-84, you press the Y= key to enter your equation, press Graph to see the image and use the Window and Zoom keys to fix how your grid looks. To enter and draw functions, start by pressing Y= and type your equation using the dedicated variable key. When your equation is entered, press the Graph button to draw your equation. Alternatively, there are graphing calculator apps and online resources that can be accessed on your smartphone, laptop or tablet.

Graphing calculators are not banned in Canada, but there can be restrictions on them for things like standardized tests and professional exams by education authorities. This can be done to prevent cheating or maintain test equity. Graphing calculators can store notes, run custom programs and feature systems that automatically solve algebraic and calculus problems. Other calculators like scientific calculators or basic calculators are good alternatives when graphing calculators aren’t allowed.

Choosing between the TI-84 and the TI-89 depends on your math level, area of study or testing rules. The TI-84 is best suited for general high school and post-secondary math because it is widely allowed for taking standardized tests. The TI-89 is a more powerful calculator that’s made for advanced engineering and physics problems because it features a Computer Algebra System (CAS). For schoolwork, their use can be restricted or banned by educators.