If Desmos looks empty, the graph is usually off the window. Zoom out or reset the axes before you decide the equation has no graph. The tool is covered in Desmos on the ACT.
Zoom first
Use the minus control, or pinch if the device allows it, until the curve enters the window. You can also open the wrench and set a wider axis range. A circle with a large radius, or a line whose intercept is far from the origin, often starts invisible. Graphing that circle is in graphing a circle in Desmos.
This is not the magnifier
Zooming the coordinate plane is inside Desmos. The magnifier that enlarges the whole item is a separate test tool, in the digital magnifier. A graph that is simply hard to read at the default scale is still a window problem, not a missing equation. The other tools on the screen are in digital ACT tools.
The bottom line
An empty grid is a window problem until you zoom out and prove otherwise.
Start practicing
Start with a free diagnostic, then drill your weak spots with 15-question quizzes and track how you're doing across Reading, English, and Math. Compare plans whenever you're ready to go further.
This article offers general ACT prep guidance. The ACT can change from year to year, including its format, scoring, policies, test dates, and fees, so always confirm the latest details on the official ACT website at act.org before you make decisions. ACT® is a registered trademark of ACT, Inc. thirty-six is not affiliated with, endorsed by, or sponsored by ACT.