Dilation, Translations, Reflections and Rotation

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)

A 90 degree clockwise rotation is the same as ...

• a 90 degree counterclockwise rotation

• a 270 counterclockwise rotation

• a 180 degree rotation

• a reflection over the x-axis

A square has sides of 6 inches and is dilated to form a square that has sides of 24. What is the scale factor?

• 1/4 because 6/24 = 1/4

• 4 because 24/6 = 4

• 30 because 24 + 6 = 30

• No way to know with this information.

Which transformation does NOT preserve congruence?

• transformation

• reflection

• rotation

• dilation

A translation moves a figure 3 units to the left. Which would describe this move?

• x - 3

• x + 3

• y - 3

• y + 3

Which of the following could be a dilation?

• (6x, 6y)

• (x + 1, y - 5)

• (x, -y)

• (-x, -y)

Which of the following could be a translation?

• (x + 5, y - 2)

• (6x, 6y)

• (-x, -y)

• (0.5x, 0.5y)