Dilations Rotations and Reflections

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

• x-axis

• x-coordinate

• y-coordinate

• none of the above

Which statement is FALSE about reflections?

• Reflections create congruent images.

• In a reflection, the image is the same distance from the line of reflection as the pre-image.

• Reflections preserve orientation.

• Reflections preserve size.

What is the equation of the line of reflection?

• x=2

• y=-2

• x=undefined

• x=-2

If a Scale Factor is between 0 and 1, then your figure gets...

• Smaller

•  Bigger

• Turned upside-down

• Does not change

Which is an example of the algebraic rule for a DILATION?

• (3x, 3y)

• (x+3, y-2)

• (-x, -y)

• (y, -x)

Which algrebraic rule shows a REFLECTION across the x-axis?

• (x, -y)

• (-x, y)

• (4x, 4y)

• (y, -x)

Which algrebraic rule shows a REFLECTION across the y-axis?

• (-x, y)

• (x+9, y+3)

• (7x, 10y)

• (y, -x)

Which is the algebraic rule for a 180 degree rotation?

• (-x, -y)

• (-y, x)

• (x -2, y-4)

• (5x, 5y)

Which is the algebraic rule for a 90 degree clockwise rotation?

• (x, -y)

• (y, -x)

• (-y, x)

• (4x, 7y)

What is the algebraic representation of a 90 degree counterclockwise rotation?

• (-y, x)

• (x + 4, y - 3)

• (6x, 6y)

• (-x, -y)