Sketch the curve represented by the parametric equations (indicate the orientation of the co rve), and write the corresponding rectangular equation by eliminating the parameter. x:3t4, y:4t+1 Find the vertex, focus, and directrix of the parabola, and sketch its graph. y2 - x+ y =0 vertex ( x, y ) = focus ( x, y ) = directrix 4 4 2 2 X X -4 -2 2 4 -4 -2 2 4 -2 -2 -4 -4 O O 4