Plot a parametric function with a line. First come the functions for x and y then optionally the t limits as t1,t2,tinc, then optionally the limits as x1,x2,y1,y2
Trazatu funtzio parametriko bat marra batekin. Lehendabizi x eta y-ren funtzioak, ondoren aukeran t limiteak t1,t2,tinc gisa, ondoren aukeran limiteak x1,x2,y1,y2 gisa