Rotations and Reflections

Which transformation below is best represented by the algebraic expression (x, y) → (-y, x)

• Reflection over the x-axis.

• Reflection over the y-axis.

• 90º clockwise rotation

• 270º clockwise rotation

Which transformation below is best represented by the algebraic expression (x, y) → (x, -y)

• Reflection over the x-axis.

• Reflection over the y-axis.

• 90º clockwise rotation

• 270º clockwise rotation

Point A is located at coordinates (-2, 7). What would be the coordinates of A' if point A is rotated 90º clockwise?

• (-7, -2)

• (7, 2)

• (2, 7)

• (-2, -7)

If point M is located at (-3, -2), and M' is located at (-2, 3), which situation below best describes this transformation ?

• Reflection over the x-axis.

• Reflection over the y-axis.

• 90º clockwise rotation

• 270º clockwise rotation

Which transformation below is best represented by the algebraic expression (x, y) → (-x, y)

• Reflection over the x-axis.

• Reflection over the y-axis.

• 90º clockwise rotation

• 270º clockwise rotation

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

• y-coordinate

• x-coordinate

• y-axis

• x-axis 

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

• x-axis

• x-coordinate

• y-coordinate

• none of the above

What type of transformation is shown?

• Translation

• Reflection

• Rotation

If (3,2)→(-3,-2) represents a counterclockwise rotation of the point on a coordinate plane, how many degrees is the rotation?

• 90

• 180

• 270

• 360

If (4,-2) → (4,-2) represents a counterclockwise rotation of the point on a coordinate plane, how many degrees is the rotation?

• 90

• 180

• 270

• 360