(x = f(t) , y = g(t))when t varies in an interval. To help you to understand this principle, this exercise presents to you the graphs of f and g in a picture, then asks you to draw the corresponding parametric curve with the mouse. You will have a score according to the precision of your drawing.
Please take note that WIMS pages are interactively generated; they are not ordinary HTML files. They must be used interactively ONLINE. It is useless for you to gather them through a robot program.