Question

What type of transformation transforms (a, b) to ​(−a, b)​?

A. a reflection over the x-axis

B. a reflection over the y-axis

C. a translation of 1 unit up

D. a translation of 1 unit down

Answer 1

@Shadow

Answer 2

d

Answer 3

I'd like to add my input.
A translation up or down would cause a change to the second coordinate. In this case, (a,b) would change to (a, b+x) or (a, b-x), instead of the actual transformation to (-a,b)

Answer 4

Since one of the coordinates changes from positive to negative by the same value, that indicates a reflection. And since the coordinate that changes is the first one, and x-coordinate, that indicates a reflection over the y-axis

Answer 5

For a visual representation