This ready-to-go activity was from "Love Maths" website called "Stained Glass Window - Graphing" (you might need to scroll down a little bit to find the Word Doc) or via Scribe here.
This was a great activity to practise drawing straight lines in the form y=mx+c. My class really enjoyed it and they looked great hanging in our classroom (bonus that it was colourful AND maths related!!! :) )
Here is my example that I showed the class. It also doubled as the heading for the display on our classroom wall!