Graphing is one of the main reasons students search for a TI 84 calculator online. This guide shows the standard workflow: enter a function, set the graph window, draw the graph, trace values and adjust the view.
Enter a function in Y=
Press Y= to open the function editor. Enter your equation after Y1. For example, type X^2-4 to graph a parabola.
Use the variable key for X. Do not type a letter X from a physical keyboard unless the emulator accepts it correctly; the calculator key is more reliable.
Draw the graph
Press GRAPH. If nothing appears, the graph may be outside the window or the equation may be entered incorrectly.
Try a simple test function such as Y1=X. If that appears, the graphing feature is working and the issue is probably the equation or window.
Set the window
Press WINDOW to control Xmin, Xmax, Xscl, Ymin, Ymax and Yscl. A common algebra view is Xmin -10, Xmax 10, Ymin -10 and Ymax 10.
If your graph looks flat, invisible or cut off, change the window. Quadratics, exponentials and trig functions often need different ranges.
Use Zoom Standard
The Zoom menu gives quick presets. Zoom Standard is a common reset for many algebra graphs. Zoom Fit can help when the y-values are outside the screen.
When students are lost, returning to a standard window is often faster than changing each value manually.
Trace graph points
Press TRACE and move left or right along the graph. The calculator displays approximate X and Y coordinates.
Trace is useful for checking intercepts, estimating maximum and minimum points, and comparing graph behavior with a table of values.
Quick reference table
| Example function | What to expect |
|---|---|
| Y1 = X | Straight line through the origin |
| Y1 = 2X + 3 | Line with slope 2 and y-intercept 3 |
| Y1 = X^2 | Upward-opening parabola |
| Y1 = X^2 - 4 | Parabola crossing near x = -2 and x = 2 |
| Y1 = sin(X) | Wave pattern; check Degree/Radian mode |