How to draw Hypothesis graphs on the iPad for Physics

Описание: Google Docs doesn't let you edit drawings on the iPad. But here is a workaround:
1. Zoom in on the blank graph
Screenshot it
2. Click the bottom right corner to open it for editing
Draw on the graph
Crop it to get just the graph
3. Hit the Squarrow (up arrow) button.
Click Copy
4. Go back to Google Docs
Click the original blank graph
Click Paste. It will replace the original graph with your drawn graph