Proportionality and Dilation

What is the center of dilation, P?

• P(0,0)

• P(0, -1)

• P(2, 0)

• P(0, 2)

• P(-2, 0)

What is the center of dilation, P?

• P(0,0)

• P(3, -1)

• P(3, -2)

• P(2, -3)

When the scale factor of a dilation is less than one, the dilation is a reduction.

• True

• False

Dilate Point B by a scale factor of 1/2

• (1.5,-4)

• (-1.5,1)

• (-1,-1.5)

• (-2,-2)

What scale factor was used to produce the image?

• 2

• -2

• ¹/₂

• 1

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

• addition 

• subtraction 

• multiplication 

• division 

Dilate Point B by a scale factor of 3:

• (12,0)

• (12,12)

• (4,3)

• (0,12)

Similar figures have the same ______ but different ______. 

• measure; shapes

• sizes; shapes

• value; measures

• shape; sizes

Does the image show a Dilation?

• Yes

• No

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)