Question

The vertices of a triangle are (-1, -2), (0, -4), and (2, -3). If the triangle is reflected over the y-axis, what will the vertices of the reflected triangle be?

Answer 1

Change the signs of all the x coordinates.

Answer 2

I was going to say flip each point over the y-axis, but what @CliffSedge said is even simpler.

Answer 3

Sometimes, just drawing the thing and doing what you think the instructions are saying will show you the way to the general solution.