Reflections Rule

What happens to the x- and y-coordinates of a point, if it is reflected over the x-axis?

• The x-coordinate stays the same and the y-coordinate changes the sign.

• The x-coordinate changes the sign and the y-coordinate stays the same.

• The x-coordinate and the y-coordinate stay the same.

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

The triangle was reflected across the y-axis.  Which algebraic representation best describes this transformation?

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

The coordinates of the vertices for quadrilateral PRST are P(1,2), R(1,4), S(3,4) and T(4,2). If quadrilateral PRST is reflected across the y-axis to create quadrilateral P'R'S'T'. Which rule describes the transformation?

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

A circle is graphed on a coordinate grid and then reflected across the x-axis. If the center of the original circle was located at (x, y), which ordered pair represents the center of the new circle after the transformation?

• (x, y)

• (x, -y)

• (-x, y)

• (-x, -y)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Pentagon VWXYZ is shown on the coordinate grid. A student reflected pentagon VWXYZV across the x-axis to create pentagon V'W'X'Y'Z'. Which rule describes this transformation?

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Select the correct algebraic representation for the reflection shown below. (Which axis was it reflected over?)

• (-x, y)

• (x, -y)

• (x,y)

• (-x, -y)

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

What is the rule for this transformation?

• (x, y) --> (x, -y)

• (x, y) --> (-x, y)

• (x, y) --> (x - 2, y + 0)

• Not here

Tags

CCSS.8.G.A.3

CCSS.HSG.CO.A.5

Identify the transformation from ABC to A'B'C'.

• 90^o clockwise rotation

• 90^o counter clockwise rotation

• Reflection across the y-axis

• Reflection across the x-axis

Tags

CCSS.8.G.A.3

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

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