Describing Reflections

Ms. Pandrea claims that the pre-image is the triangle under the x-axis. Is she correct? Explain.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Ms. Pandrea claims the post-image is the darker shaded triangle (towards the top of the graph). Is she correct? Explain.

Tags

CCSS.8.G.A.2

CCSS.HSG.CO.B.6

What is the Algebraic Notation for this Reflection?

• (x, y) → (y, x)

• (x, y) → (-x, y)

• (x, y) → (-y, -x)

• (x, y) → (x, -y)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Reflect the point (2, -4) over the y-axis.

• (-4, 2)

• (-2, 4)

• (-2, -4)

• (2, 4)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Reflect (6, -3) over the line x-axis.

• (6, 3)

• (-6, -3)

• (-3, 6)

• (3, -6)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Reflect Point C over the y-axis:

• (-3, 2)

• (3,2)

• (-2,3)

• (3,0)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

∆QRS contains the points: Q(4, 2) R(5, 1) S(3,7). If the triangle is reflected across the y-axis, what will S' be?

• S'(3, 7)

• S'(-3, 7)

• S'(-3, -7)

• S'(3, 7)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Reflecting over the y-axis changes the ____-_____________. 

• x-axis

• x-coordinate

• y-coordinate

• y-axis

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

The reflection of J (-1,11) is J' (-1, -11).  what is the reflection of D (5, -5) when reflected over the same axis of reflection? 

• (-5,5)

• (5,5)

• (5,-5)

• (-5, -5)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Point C (-5, 4) is reflected over the x-axis. What are the coordinates of C'? 

• (5, 4)

• (-5, -4)

• (5, -4)

• (-5, 4) 

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5