Basic Maths Game in Flash

I am looking for a flash based maths game to be built for my free teaching website. The game will need to use the features in straight line graphs. By this I mean you will need to beable to input 3-6 mathematical lines such as y=2x+3 and it will draw this graph onto the axis in the game. There will be 6 rounds to the game so it will need 6 separate levels that can be played by one player (3 goes) or 2 player in which there are 3 goes each totalling 6 goes at inputting lines. I would also like the game themed so there will be a points tally system based within the game and also a character theme to the game as well so it will need some animation. It will also need some basic sound etc. The game will need to look crisp and colourful. I have attached a picture to describe the mathematical function that will be required.