Activity Overview
Watch Activity Tutorial
Reflections in the x and y axes, the line y = x and also x = n and y = m, they're all here. The companion video helps students understand reflections and how they can be performed on the calculator. This activity includes a range of extension questions that are more conceptually demanding.
Objectives
The purpose of this activity is to help students understand reflections and generalise their knowledge beyond reflections in the x and y axes. The inclusion of a reflection in the line y = x is included but no mention of 'inverse', just a focus on the basic concept that the reflection will be the same distance from the mirror as the object. Students also explore functions that are invariant in a reflection.
Vocabulary
- Reflection
- Perpendicular
- Invariant
About the Lesson
Watch Activity Tutorial
Students watch the reflections video to get a basic understanding and then use their calculator to explore and generalise. The activity includes extension questions that explore reflections in lines x = m, y = n and y = x.