For best printing, we recommend using the Google Chrome browser. To print your graph, you'll need to access Desmos in the browser. Unfortunately, printing isn't available on mobile devices. Start by clicking the Share button and choosing Print.
A dialog box will pop up with a preview of the printout. An image of your graph will print on the first page and the expression list will print on the next pages.
If you'd like for the graph image to fill the page, try printing in landscape mode rather than portrait.
You can choose which printer you'd like to use or you can choose Save as PDF to generate a PDF version. The name and url of the graph as well as the date will print on all pages.
*printing is not available on mobile versions
If you are on a Windows computer, you can do this with the Print Screen button. More information on this topic can be found here: http://www.wikihow.com/Take-a-Screenshot-in-Microsoft-Windows
If you are on an Apple computer, you can do this by pressing command+shift+4 and selecting the area of your screen you wish to take a screen shot of. This image will be saved to your desktop and you can print it out from there. More info on taking screen shots is here: http://www.apple.com/findouthow/mac/#capturescreen