Reflections and Translation Rules

Given P(2,-4) I(1,-8) G(-3,5): Reflect across the y-axis...What are your coordinates?

• P(2,4) I(-1,8) G(3, -5)

• P(-2, -4) I(1,8) G(-3,-5)

• P(2,4) I(1,8) G(-3, -5)

• P(-2,-4) I(-1,-8) G(3,5)

Given P(2,-4) I(1,-8) G(-3,5): Reflect across the y = x...What are your coordinates?

• P(4,2) I(8,1) G(5,-3)

• P(-2, -4) I(-1, -8) G(3,5)

• P(-4,2) I(-8,1) G(5,3)

• P(2,4) I(1,8) G(3,5)

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

• y-coordinate

• x-coordinate

• y-axis

• x-axis 

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

• (-4, 2)

• (-2, 4)

• (-2, -4)

• (2, 4)

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

• Reflection across the x-axis

• Reflection across the y-axis

• 90^o clockwise rotation

• 90^o counterclockwise rotation

The rule for reflection over the y-axis is  
(x, y) --> _

• (-x, y)

• (x, -y)

• (y, x)

• (-y, x)

A transformation in which a geometric figure is reflected across a line, creating a mirror image. 

• Translation

• Reflection

• Rotation

• Dilation

Which rule would result in a translation of 2 units left and 3 units up?

• (x, y) → (2x, 3y)

• (x, y) → (x - 2, y + 3)

• (x, y) → (-x, -y)

• (x, y) → (x + 2, y - 3)

(x,y) --> (x+a, y+b)

• translation

• rotation

• reflection

• dilation

(x,y) --> (x, -y)

• Reflection over the y-axis

• Reflection over the x-axis

• Translation 

• Rotation 180 °