Question

point a (8, -10) is reflected over the y-axis. write the coordinates of a

Answer 1

If you reflect something over the y axis, you reverse the x coordinate, because as you reflect it over the y axis, it's not changing its height, it's changing its place on the x axis.

So basically, 

(8, -10)

becomes 

(-8, -10)

Answer 2

When a shape is reflected, it must be reflected across a line.

The coordinates of the image of a is $\mathbf{(-8,-10)}$

The vertex of point a is:

$\mathbf{a = (8,-10)}$

When a point is reflected across the y-axis, the transformation rule is:

$\mathbf{(x,y) \to (-x,y)}$

So, we have:

$\mathbf{(8,-10) \to (-8,-10)}$

Hence, the coordinates of the image of a is $\mathbf{(-8,-10)}$

Read more about reflections at:

https://brainly.com/question/938117