How to Graph on a TI-84 Calculator

Introduction

Graphing is one of the most useful TI-84 skills because it helps you see equations instead of only calculating values. You can use the online TI-84 calculator on this site to practice basic graphing before using a physical calculator in class.

Step-by-step instructions

1. Press the Y= key on your calculator.
2. Type the function into Y1. For example, enter x^2 - 4.
3. Press GRAPH to draw the function.
4. If the graph looks empty, press ZOOM and choose a standard viewing window.
5. Use TRACE to move along the curve and inspect x and y values.
6. Use WINDOW when you need custom x-min, x-max, y-min, and y-max values.

Practical example

To graph y = x^2 - 4, enter x^2 - 4 in Y1. The graph should cross the x-axis at -2 and 2. This is a good way to connect factoring with a visual result.

Common mistakes

• Forgetting to clear an old function in Y2 or Y3.
• Typing a minus sign instead of the negative key when entering negative values.
• Using a window that is too zoomed in or too zoomed out.
• Missing parentheses around grouped expressions.

FAQ

Why is my graph blank?

Your graph may be outside the current window. Try a standard zoom or adjust WINDOW values.

Can I graph more than one function?

Yes. Enter another function in Y2, Y3, or another open line.

Where should I learn the full TI-84 workflow?

Start with the complete TI-84 guide, then return to the calculator on the homepage to practice.

Try the calculator on this site when you want quick browser practice without opening a separate emulator.