Question

The coordinates of the vertices of CDE are C(1, 4), D(3, 6), and E(7, 4). If the triangle is reflected over the line y = 3, what are the coordinates of the image of D?

(3, –6)
(3, –3)
(3, 0)
(3, 9)

Answer 1

(x,y) --> (x,6-y)
D: (3,6) --> (3,0)