Question

when reflecting a figure across the y - axis, which coordinate(s) remain the same? (1 point)
x - coordinates
y - coordinates
polar coordinates
inverse coordinates

Explanation:

When reflecting a point $(x,y)$ across the y - axis, the transformation rule is $(x,y)\to(-x,y)$. The y - coordinate remains the same while the x - coordinate changes its sign. So for a figure (a collection of points), the y - coordinates of all points remain the same upon reflection across the y - axis.

Answer:

B. y - coordinates