Below are frequently asked questions from Desmos students just like you!
To enter a fraction, try using the "/" symbol on your keyboard. Or, you can use the Desmos keypad.
To convert a decimal to a fraction, use the icon to the left of the expression line in the graphing calculator and on the right in the scientific and four function calculators.
For more extensive data, you may find it easier to manually adjust the domain and range of the viewport. To do so, click on the wrench to open the Graph Settings menu and choose which axis you'd like to adjust. For more information check out this article on graphs settings.
Click on a gray dot to open the coordinates at that point - click the point again to hide the coordinates.
One tip - to see the coordinates on your curve, it's best to enter the expression explicitly.