If ABC is reflected across the y-axis, what are the coordinates of A? A (1-3) B. (-1, -3)
C. (5,-3)
D. (-1,3)

d. (-1, 3)

Step-by-step explanation:

Reflecting across y axis means the x coordinate will change.

Imagine a mirror image of the triangle on the other side of Y axis.

A's coordinates on the right are (1, 3)

So if we flip across Y the coordinates will now be (-1, 3)

3 stays the same because it is still in the same position vertically.

i got 10.28 but that rounds up to 10.3