Dilations at the Origin

What is the scale factor of a dilation that doubles the distance of every point from the origin?

• 0.5

• 1

• 2

• -2

Tags

CCSS.8.G.A.3

• The figure's area becomes four times larger.

• The figure's area becomes twice as large.

• The figure's area is reduced to one-fourth.

• The figure's area is reduced to one-half.

Tags

CCSS.7.G.A.1

• (-9, 12)

Tags

CCSS.8.G.A.3

What is the scale factor of a dilation that reduces a shape to one-third of its original size?

• 3

• -3

Tags

CCSS.8.G.A.3

State the coordinate of the image of the given point B (4,9) under a dilation with center at the origin with the given scale factor of 2.

• B' (2 , 4.5)

• B' (-8 ,-18)

• B' (8 ,18)

• B' (9 ,4)

Tags

CCSS.8.G.A.3

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

• 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

State the coordinate of the image of the given point B (-10,-6) under a dilation with center at the origin with the given scale factor k = 1/2.

• (5,3)

• (20,12)

• (-20,-12)

• (-5,-3)

Tags

CCSS.8.G.A.3

In a dilation what mathematical operation is used with the scale factor?

• addition 

• subtraction 

• multiplication 

• division 

Tags

CCSS.8.G.A.3

Is this an enlargement or reduction? (blue = original image)

• reduction

• enlargement

Tags

CCSS.8.G.A.3

If point is at N(-1, 2) and point is at N'(-2, 4), what scale factor was point N multiplied by?

• 2

• 3

• 1/3

• 1/2

Tags

CCSS.8.G.A.3