T.5: Dilations

What are the coordinates of the image for point B (4,9) under a dilation with a scale factor of 2?

• B' (2 , 4.5)

• B' (-8 ,-18)

• B' (8 ,18)

• B' (9 ,4)

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

What are the coordinates of the image for point A(3, 6) after a dilation with a scale factor of 2?

• A' (3, 6)

• A' (1.5, 3)

• A' (6, 12)

• A' (12, 6)

Tags

CCSS.8.G.A.3

Which rule represents a dilation with a scale factor of 3?

• (x, y) → (1/3x, 1/3y)

• (x, y) → (-3x, -3y)

• (x, y) → (x + 3, y + 3)

• (x, y) → (3x, 3y)

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

Which rule represents a dilation with a scale factor of 1/2?

• (x, y) → (2x, 2y)

• (x, y) → (1/2x, 1/2y)

• (x, y) → (-2x, -2y)

• (x, y) → (2x, 1/2y)

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

What are the coordinates of the image of G (-10,-6) after a dilation with a scale factor of 1/2?

• G' (5,3)

• G' (20,12)

• G' (-20,-12)

• G' (-5,-3)

Tags

CCSS.8.G.A.3

If your scale factor is 0.8, what type of dilation is it?

• Reduction

• Enlargement

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

If your scale factor is 2.5, what type of dilation is it?

• Reduction

• Enlargement

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

Enlargement or reduction? Find the scale factor!

• Reduction with a scale factor of 2.

• Enlargement with a scale factor of 2.

• Enlargement with a scale factor of 1/2.

• Reduction with a scale factor of 1/2.

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

Dilate triangle ABC by a scale factor of 3 with the origin as the center of dilation. What are the coordinates of the image?

A(3,3) B(6,6) C(9,3)

• A'(9,9) B'(18,18) C'(27,9)

• A'(6,6) B'(9,9) C'(12,6)

• A'(0,0) B'(3,3) C'(6,0)

• A'(1,1) B'(2,2) C'(3,1)

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

Dilate by a scale factor of 1/2.

• B' (1.5, -4)

• B' (-1.5, 1)

• B' (-1, -1.5)

• B' (-2, -2)

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4