Hide a button until a sketch is made

I am wondering if there is a way to hide a button until a mark is made on a graph:

https://teacher.desmos.com/activitybuilder/custom/6165a4e4fcbd8728fec700a4

I am hoping to have a ‘Check my work’ button for a student after they graph an ordered pair… but I don’t want them to be able to see the button until after they have attempted to plot the point.

I answered my own question…

disabled: graph1.sketch.strokeCount = 0