Parametric EquationsTo represent motion in thexyplane, letx=f(t)describe thehorizontal motion andy=g(t)describe the vertical motion.x=f(t)y=g(t)��parametric equations of a curve with parametert.Cartesian equations only containxandyterms such asy=x2orxsiny+ 3y-x= 4.Parametric equations enable usto graph curves that are not functions.ex.x= sin(2t),y= cos(3t),0t2p