TI-84 Guides
Step-by-step guides for AP Statistics, IB Math, and common TI-84 Plus CE errors.
Error Fixes
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TI-84 Not Showing Graph — How to Fix
Covers all 7 reasons the graph screen is blank and how to fix each one.
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TI-84 Stuck on Validating OS — Fix
Step-by-step guide to break out of the firmware verification loop.
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TI Connect CE Not Recognizing Calculator
Fix the "No calculator detected" error on Windows and Mac.
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TI-84 Showing Decimals Instead of Fractions
3 ways to get exact fractions on the TI-84 Plus CE.
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TI-84 Error Messages Explained
ERR:SYNTAX, ERR:DOMAIN, ERR:WINDOW RANGE and more — all explained.
AP Statistics
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normalcdf & invNorm on TI-84 — Complete AP Statistics Guide
Learn how to use normalcdf and invNorm on the TI-84 Plus CE for AP Statistics. Includes syntax, examples, common mistakes, and AP exam writing tips.
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Hypothesis Testing on TI-84 — Z-test, T-test & Proportion Test
Step-by-step guide to running hypothesis tests on the TI-84 Plus CE. Covers 1-PropZTest, Z-Test, T-Test, and how to interpret p-values for AP Statistics.
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Linear Regression (LinReg) on TI-84 — AP Statistics Guide
How to calculate LinReg(ax+b) on the TI-84 Plus CE. Includes entering data in lists, running regression, interpreting r and r², and AP exam format.
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Confidence Intervals on TI-84 — ZInterval, TInterval & More
Calculate confidence intervals on the TI-84 Plus CE. Covers ZInterval, TInterval, 1-PropZInt with worked examples in AP Statistics format.
IB Math
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IB Math TI-84 Reference Guide — AA & AI
Essential TI-84 Plus CE functions for IB Math Analysis & Approaches and Applications & Interpretation. Covers statistics, calculus, and graphing.
Practice with the free TI-84 calculator
→ Open the TI-84 Plus CE emulator