Question

If a point P(1, –2) is reflected across the line x = 3, what are the coordinates of its reflection image?

(1, 8)
(–7, –2)
(1, –4)
(5, –2)

Answer 1

Point P(1, -2) is two unit to the left of the line x = 3 ad so the image will be two places to the right of the line x = 3.
Coordinate of the image = (5, -2)