Question

Find the coordinate of the vertices for the new image if the segment AB are reflected across x = 3. A(4, 3), B(2, 0)

Answer 1

suggest sketch the problem
Use the same grid plot the points A and B then connect line. Now put the line x = 3
a reflection across the line x = 3 is parallel to a reflection across the y-axis. (x,y) becomes (-x, y)