Question

What type of transformation transforms (a , b) to (-a , b)

Answer 1

This type of transformation is called mirroring in the y-axis.

Explanation:

By mirroring in the y-axis, you can find the new value, by multiplying the x-coordinate by -1.

Any point (a , b) will be transformed after mirroring in the y-axis, to (-a , b), which is the question here.

This type of transformation is called mirroring in the y-axis.

Answer 2

A reflection across the y axis

Explanation:

think about it, if you reflect some point across the y-axis it will have a negative x value. For example, if you reflect (1,2) across the y-axis you will get (-1,2)