Given the vertices of isosceles trapezoid ABCD: A(2, 0), B(4, 0), C(5, -2), D(1, -2). If the image is reflected over the y-axis, then D' =

(-1, -2). When an image is reflected over the y-axis, the x-coordinate of each point is negated while the y-coordinate remains the same. Therefore, the x-coordinate of point D (1) becomes -1 when reflected over the y-axis, while the y-coordinate (-2) remains the same. Thus, the coordinates of D' are (-1, -2).