Which rule describes a transformation across the y-axis? (x, y) mc028-4.jp

Mathematics
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 Which rule describes a transformation across the y-axis?
 
A.(x, y) -> (x, -y)
B.(x, y) ->(-x, y)
C.(x, y) ->(y, x)
D.(x, y) ->(-x, -y)
Apr 30th, 2015

Transformation across the y-axis reverses the sign of the x coordinate.

(x, y) ---->  (-x, y)


The attached picture shows an example.

reflection-y.gif 


ANSWER:  B)  (x, y) ---->  (-x, y)

Apr 30th, 2015

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