PLAT has vertices P(-1,1), L(0,2), A(1,2). T(0,1). P'L'A'T' is the image of PLAT for the translation (x,y)+(x+3y-2). Show that PP', LL, AA, and TT' are all parallel. Two segments are parallel if are Find the coordinates of the images of the vertices by y-coordinate. each x-coordinate and each