Triangle ABC is shown on the graph below.

Triangle ABC is shown on a graph. Vertex A is at the point left parenthesis 1 comma 3 right parenthesis. Vertex B is at the point left parenthesis 4 comma 5 right parenthesis. Vertex C is at the point left parenthesis 3 comma 1 right parenthesis.

Triangle ABC is reflected over the y-axis. What are the coordinates of the reflected triangle?
Describe in words what happens to the x-coordinates and y-coordinates of the original triangle’s vertices as a result of this reflection.

1 answer

The coordinates of the reflected triangle are: A (-1, 3), B (-4, 5), C (-3, 1).

As a result of the reflection, the x-coordinates of the original triangle's vertices are multiplied by -1, which flips them over the y-axis. The y-coordinates stay the same.