Top 10 TI-84 Calculator Functions for Students

The TI 84 calculator is a powerful tool for students in algebra, geometry, trigonometry, statistics, and even calculus. But with so many buttons and menus, it can be hard to know which functions matter most.

This guide highlights the top 10 TI 84 calculator functions every student should know from basic calculations to advanced graphing and data analysis. Mastering these will make your schoolwork faster and more accurate.

1. Basic Arithmetic and Exponents

At its core, the TI 84 is still a calculator.

How to Use:

• Type expressions like 4 + 3 × 2, and it will follow the order of operations.
• Use the ^ key for powers:
  Example: 2^3 = 8

Pro Tip: Use parentheses for clarity, like (3 + 2)^2.

2. Graphing Equations

One of the most-used features in algebra and calculus.

How to Use:

• Press Y= and enter an equation like x^2 + 3x
• Press GRAPH to see the curve
• Use ZOOM > 6:ZStandard if the graph doesn’t appear correctly

This function helps visualize how equations behave.

3. Table of Values

The table helps you see input-output relationships without manual calculations.

How to Use:

• Enter a function in Y=
• Press 2nd + GRAPH to open the TABLE

You’ll see a list of X values with matching Y results.

4. Trace Function

Use this to move along the curve and view specific coordinates.

How to Use:

• After graphing, press TRACE
• Use arrow keys to move along the curve
• Coordinates will appear at the bottom

This is helpful for estimating roots, max/min, or intercepts.

5. Zoom and Window Settings

Sometimes your graph doesn’t show up—it may be outside the view window.

Zoom Functions:

• ZOOM > 6:ZStandard → Default window
• ZOOM > 0:ZoomFit → Automatically adjusts the y-axis

Manual Control:

• Press WINDOW to set Xmin, Xmax, Ymin, Ymax

Understanding this saves time and frustration.

6. Solving Equations with Graph Intersections

You can solve equations by finding where two graphs intersect.

Example:

Solve 2x + 1 = x^2

How to Use:

• Enter Y1 = 2x + 1 and Y2 = x^2
• Press GRAPH
• Press 2nd + TRACE > 5:intersect
• Move cursor close to the point of intersection and press ENTER 3 times

The calculator will show the solution.

7. Statistical Data Entry and Analysis

Essential for students taking statistics or AP Stats.

How to Enter Data:

• Press STAT > 1:Edit
• Enter values into L1, L2, etc.

Run One-Variable Stats:

• Press STAT > CALC > 1:1-Var Stats
• Choose your list (e.g., L1) → Press ENTER

You’ll get mean, standard deviation, and more.

8. Square Roots and Absolute Value

These are common in algebra and geometry.

Square Root:

• Press 2nd + x² to insert √(
• Example: √(25) → Result: 5

Absolute Value:

• Press MATH > Scroll right to NUM > Select 1:abs(

9. Storing and Recalling Variables

You can store values and use them in later calculations.

Example:

• Type 5 > Press STO→ > ALPHA + A > Press ENTER
• To use: Type ALPHA + A + × 2 → Press ENTER

This is useful when using the same value in multiple steps.

10. Resetting the Calculator

If something’s not working or settings are messed up, reset the TI 84.

How to Reset:

• Press 2nd + + (MEM)
• Choose 7:Reset
• Select All RAM > Press ENTER

Caution: This deletes stored data and programs.

Bonus: Accessing Hidden Functions

Many keys have secondary functions printed above them in blue or green:

• Use 2nd to access blue commands
• Use ALPHA to access green lettered functions

Learning these shortcuts will help you navigate faster.

Conclusion

The TI 84 calculator functions listed above cover everything a student needs for high school or early college math. Once you get comfortable with them, you’ll not only save time—you’ll understand problems better and boost your test performance.

Mastering these 10 features is a smart first step in becoming a calculator pro.