This module is a graphical exercise on parametric curves in the cartesian plane.
A parametric curve is determined by two real functions f and g of a parameter t. This curve is therefore the set of points (x=f(t),y=g(t)) for different values of t. On the other hand, we also have the graphs of the two coordinate functions f and g which are curves.
This exercise can either present the two curves of f and g and ask you to recognize the parametric curve (x=f(t),y=g(t)) among others, or present the parametric curve and ask you to recognize the curves of f and g.
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