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.

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

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?

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)

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?

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

• (-x, y)

• (x, -y)

• (x,y)

• (-x, -y)

What is the rule for this transformation?

• (x, y) --> (x, -y)

• (x, y) --> (-x, y)

• (x, y) --> (x - 2, y + 0)

• Not here

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

What is the Algebraic Notation for this Reflection?

• (x, y) → (y, x)

• (x, y) → (-x, y)

• (x, y) → (-y, -x)

• (x, y) → (x, -y)

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

• x-axis

• x-coordinate

• y-coordinate

• y-axis