As requested by the teacher, I have modified my existing Primary School Speed simulation to show the radomized graph.  
The student will need to try to guess the variable being represented on the Graph. Enjoy!

/htdocs/ntnujava/ejsuser/130498/users/sgeducation/engrg1/2013Speed/PriMathSpeedV9_pkg/PriMathSpeedV9.propertiesFull screen applet or Problem viewing java?Add to exception site list
Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop. This work is licensed under a Creative Commons Attribution 2.5 Taiwan License
Download EJS jar file(1028.7kB):double click downloaded file to run it. (6 times by 6 users) , Download EJS source View EJS source