Question

what will be the coordinates of B’ if the triangle below if reflected across the y-axis?I selected (-2,-1) double checking my answer

Answer 1

Answer:

B'(-2, -1)

Explanations:

When a point (x, y) is reflected across the y-axis, the coordinate of the image is (-x, y)

The coordinate of B is:

B(2, -1)

Therefore, the corrdinates of the image B' will be:

B'(-2, -1)