1. 3B Reflections 9-2 in textbook
Objective:
To find reflection images of figures

2. Essential Understanding
When you reflect a figure across a line, each point of the figure maps to another point the same distance from the line but on the other side. The orientation of the figure reverses.

3. Ordered Pair: (x, y) Ordered Pair Rule: (x, y) → (x + h, y + k)
Fold your graph paper into 4 equal parts
Draw a coordinate plane in each part
In box 1, draw a quadrilateral
Translate each vertex Right 2 Down 3
Ordered Pair: (x, y)
Ordered Pair Rule:
(x, y) → (x + h, y + k)
h is horizontal shift
k is vertical shift
(x, y) → (x + 2, y – 3)

4. Complete the following transformations on your remaining grids.
Then describe the transformation.
(x, y) → (– x, y)
(x, y) → (x, – y)
(x, y) → (– x, – y)
(x, y) → (y, x)
Reflection: y-axis
Reflection: x-axis
Rotation about the origin
Reflection: y = x