How to Use the TI-84 Calculator — Complete Guide
This guide covers common TI-84 tasks using familiar key sequences. Physical models and the browser calculator can differ, so use your course instructions when exact behavior matters.
Getting Started
Press ON on a physical calculator to power up. 2nd accesses secondary functions, while ALPHA accesses letters. Use MODE to check Degree/Radian and other settings before a calculation depends on them.
Graphing Functions
Press Y=, enter a function in Y1, then press GRAPH. Use WINDOW to set viewing bounds or ZOOM → 6:ZStandard for a common standard window.
Statistics
Press STAT → 1:Edit and enter values in L1. Then open the STAT CALC menu and choose 1:1-Var Stats for common summary statistics.
Matrices
Use 2nd → x⁻¹ (MATRIX) on models that use that key path. Define a matrix in the EDIT tab, then return to the home screen to use it in supported matrix operations.
Reset & troubleshooting
If a calculator behaves unexpectedly, first check the mode, the expression, matrix dimensions and graph window. A full RAM reset removes stored RAM data, so use it only when you intend to clear that data.
Exam rules
Calculator rules vary by assessment and can change. See the dedicated exam page for current SAT, ACT and AP guidance and official policy links.