TI-84 Frequently Asked Questions

Yes, up to a point. On the TI-84 Plus and TI-84 Plus CE you can solve a single equation for one unknown with the interactive solver (MATH ▸ 0:Solver), and you can solve linear systems exactly with the PlySmlt2 app found in the APPS menu on the TI-84 Plus CE. The solver finds one numerical solution near a starting guess, so equations with several solutions need a different guess for each one. On the SAT, remember that some of these app tools are restricted — check the exam page before relying on them.

A TI-84 Plus or TI-84 Plus CE cannot connect directly to a Chromebook through TI Connect software, because that software runs on Windows and macOS only. The practical options are: use a USB cable plus a Windows or Mac computer to transfer files, transfer calculator-to-calculator with a unit-to-unit link cable, or move programs as plain text files that you type or paste in. Texas Instruments also offers the TI Connect CE app for Chrome OS in some school deployments, but support varies — check with your teacher.

Pressing 2nd then + (MEM) opens the memory menu, where 2:Reset gives you options to clear RAM, reset defaults like the window and mode settings, or reset everything including archived apps. Clearing RAM keeps the operating system and archive but wipes RAM lists, programs and settings. Follow the steps in our reset guide so you do not delete archived programs you still need.

The usual causes are dead or weak batteries, a display contrast turned all the way down, or an app or shell that has taken over the screen. First press 2nd and hold the up arrow to raise the contrast. If that fails, install fresh alkaline batteries, then press ON. If the calculator is still blank after that, remove the batteries, hold and release ON, and reinsert the batteries — this performs a hard reset of the RAM.

ERR: SYNTAX means the calculator could not read the expression you typed, so it refused to evaluate it. It is almost always a missing closing parenthesis, a comma where the calculator expected a different separator, a function used in the wrong mode, or an unfinished expression. Press 2 (Goto) to jump the cursor to the exact character the calculator objected to, which is usually the fastest way to spot the mistake.

ERR: DOMAIN means the input you gave is outside the domain of the operation — for example taking the square root of a negative number while in real mode, taking the log of zero or a negative number, or asking for an inverse trigonometric ratio outside the range −1 to 1. It is a maths problem rather than a typing problem, so recheck the values and the mode before changing the expression.

ERR: INVALID DIM appears when a list or matrix operation receives dimensions it cannot use, such as plotting a scatter plot with two lists of different lengths, running a regression where L1 and L2 have unequal numbers of entries, or editing a matrix group of the wrong size. Check that L1 and L2 have exactly the same number of rows and clear any stray values below the last real entry.

No. Error messages are the calculator refusing to continue, not a fault. Nothing is deleted and no data is corrupted. Pressing CLEAR or ON returns you to the home screen with your lists, programs and settings intact. The only operations that delete data are the deliberate options inside the memory menu, such as 2:Reset or 7:Clear Entries.

Yes. Graphing calculators, including the TI-84 Plus and TI-84 Plus CE, are permitted on every math question of the digital SAT, and the Bluebook test app also provides an on-screen graphing calculator. Calculators with a computer algebra system, a QWERTY keyboard, or a wireless connection are prohibited. Confirm the current policy on the College Board site before test day, as rules are updated from time to time.

Yes, on the mathematics test only. ACT does not permit calculators on the science test. The TI-84 Plus and TI-84 Plus CE are both on ACT’s permitted list; calculators with a built-in computer algebra system or a QWERTY keyboard are not. Because ACT updates its calculator policy periodically, verify the details with ACT before your test date.

Yes for the AP exams that allow a calculator: AP Calculus AB and BC, AP Statistics, AP Precalculus, AP Physics and several others permit a graphing calculator such as the TI-84 Plus or TI-84 Plus CE. A calculator with a computer algebra system is not allowed on AP Calculus. Programme your calculator beforehand, because clearing memory is not required and stored programs are permitted unless the exam instructions state otherwise.

Usually yes, with conditions. IB expects a graphic display calculator (GDC) for the exams that need one, and the TI-84 Plus family is widely used. IB also allows a calculator with a computer algebra system on some papers but not others, so check the rules for your specific subject and level, and check whether your school must clear or verify memory before the exam. Always confirm with your IB coordinator.

It depends on the exam board and, often, your school. The SAT and ACT do not require you to clear memory, but an exam supervisor may ask to see the calculator and check that no unauthorised apps or communication features are present. Some IB and school-based exams require programs and notes to be cleared, or the calculator to be put into a specific mode. Ask your teacher or exam coordinator what applies to you.

It can be, if you buy from a seller that states the unit is tested and working and offers a return window. Refurbished TI-84 Plus units typically cost noticeably less than new ones and perform the same functions; the main risks are a worn screen, weak battery contacts, or a missing USB cable. See our refurbished buying guide for the exact checks to perform in the first five minutes after it arrives.

A TI-84 Plus runs on four AAA alkaline batteries and usually lasts several months of normal classroom use; the backup lithium cell behind the battery cover lasts years and only protects memory when the main batteries are removed. A TI-84 Plus CE has a rechargeable lithium-ion battery that typically holds a charge for many hours of use. Heavy graphing, long programming sessions and leaving the unit on all day shorten both figures.

The TI-84 Plus is the older, thicker model with a monochrome screen, four AAA batteries and a 96×64 pixel display. The TI-84 Plus CE is slimmer, has a bright backlit colour screen, a rechargeable battery and a faster processor, and it supports more memory for apps and programs. Both are accepted on the same exams. The Plus CE is generally the better buy if you are purchasing new.

Practical additions are a spare set of AAA batteries or the charging cable for the CE, a screen protector, a hard case, and a unit-to-unit link cable if you share programs. A USB computer cable matters only if you plan to transfer files. Beyond those, most accessories are cosmetic, so spend on a case and screen protection before anything else.

No. Calc Classroom Tips is an independent study resource for students and teachers. We are not affiliated with, endorsed by or sponsored by Texas Instruments, the College Board, ACT or the International Baccalaureate Organization. Calculator and exam names are used only to identify the products and tests we write about.

Exam rules change infrequently, and we revise those pages whenever an official announcement changes what students may bring. Each page shows a “last updated” date so you can see how current it is. Because policy can change between our updates and your test day, always confirm the requirement with the official exam authority.

Most do. The TI-84 Plus and TI-84 Plus CE share the same menu structure and keystrokes, so our guides apply to both. Many steps also transfer to the TI-83 Plus and the TI-Nspire in handheld mode, but key positions and menu names can differ, so check the screen figures in each guide before assuming a step will be identical.