Reflections X Y Axis

When a coordinate reflects over the y-axis the x-coordinate...

• changes to its opposite sign

• stays the same

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

When a coordinate reflects over the x-axis the y-coordinate...

• changes to its opposite sign

• stays the same

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

The blue figure is reflected over the x-axis. True or False?

• True

• False

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

What is the rule for a reflection over the y-axis?

• (x,y)→(-x,y)

• (x,y)→(x,-y)

• (x,y)→(-x,-y)

• (x,y)→(y,x)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Identify the coordinates of the image with a REFLECTION over the y-axis.

A' ​ (a)  

B'​ (b)  

C'​ (c)  

D'​ (d)  

​

• (6,6)

• (3,6)

• (8,3)

• (5,3)

• (-3,5)

• (-6,6)

• (3,8)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Reflections over the x-axis change the ____-__________.

• y-coordinate

• x-coordinate

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

If the dotted figure is the image, the original figure was reflected over the ...

• x-axis

• y-axis

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Complete the mapping for a reflection over the y-axis:

(x, y) --> (​ ​ (a)   ,​ ​ (b)   )

• x

• -y

• -x

• y

Tags

reflections

transformations

mappings

Given pre-image point (4,2)

Plot the pre-image & image after a reflection over the y-axis

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Graph the points (-3, 2) (-6, 3) and (-4,6). Reflect the image over the y axis and graph the new points.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5