What is the reflection of the point (5, -3) in the line y = 3?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. (5, 9).
If a point (x, y) is reflected by a line y = a, one can find the relation between the actual point and the coordinate of image points.
(x, y) → [x, (2a - y)]
So one can say that the reflection of (5, -3) is (5, 2 × 3 - (-3))
= (5, 9).