Question
What is the reflection of the point (8, -5) in the line y =
2?Solution
If a point (x, y) is reflected across that line y = a, then, the relation between coordinates of actual point and image point will be
(x, y) → [x, (2a - y)]
So the reflection of the point (8, -5) along y = 2 will be
(x, y) → [8, (2(2) - (-5))]
(x, y) → (8, 9)
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