Chapter 12 - Parametric Equations, Polar Coordinates, and Conic Sections - 12.1 Parametric Equations - Exercises - Page 603: 19

The arrows indicated the direction of motion.

(a) $c\left(t\right)=(\sin t ,-t)$ - Figure (IV) (b) $c\left(t\right)=\left(t^2-9,8 t-t^3\right)$ - Figure (II) (c) $c\left(t\right)=\left(1-t,t^2-9\right)$ - Figure (III) (d) $c\left(t\right)=(4 t+2,5-3 t)$ - Figure (I)