Question

original coordinates\treflected across the y - axis
a(1,3)\ta(-1,3)
b(4,3)\tb(-4,3)
c(4,1)\tc(-4,1)
d(1,1)\td(-1,1)

1. describe how the coordinates changed.
2. each x - coordinate is the? the x - coordinate in the original figure.

each y - coordinate is the? the y - coordinate in the original figure.

Explanation:

When reflecting a point across the y - axis, the rule is (x,y)→(−x,y). So, the x - coordinate changes its sign (becomes the opposite), while the y - coordinate remains the same.

Answer:

Each x - coordinate is the opposite of the x - coordinate in the original figure.
Each y - coordinate is the same as the y - coordinate in the original figure.