Learn how to reflect a triangle over the y axis ex 2

The video tutorial explains how to determine a reflection over the Y axis using symmetry. It introduces the concept of reflection, explains the rule for reflecting coordinates, and demonstrates how to apply this rule to specific points. The tutorial also includes a graphing exercise to visualize the reflection process, concluding with a summary of the key points.

What happens to the Y coordinate of a point when it is reflected over the Y axis?

How can you visualize the reflection of a shape over the Y axis using a physical method?