Painting By Numbers (equations and inequalities)

I use this as a termly competition I have run with all classes. It allows students to be very creative whilst practicing how to plot equations and graphical inequalities. I have included a sample image with instructions to show them what you can create. The great thing about this task is it works with all ability levels as the picture can be as simple or complex as the person wants. Higher level groups and older students can start using quadratics, cubics and trig graphs to add more detail. Kind of a fancy etch a sketch really. A brilliant way to show people how creative and beautiful maths can be.