Dilations on a Plane

What scale factor was used to produce the image?

• 2.5

• 1.5

• 3.5

• 4

The red triangle has been dilated by a scale factor of 1/4 about the origin, which triangle is it's new image?

• green triangle 

• red triangle 

• black triangle

• none of these 

Which rule best represent the dilation applied to quadrilateral ABCD to create quadrilateral A'B'C'D'?

• (x,y) --> (1/2x,1/2y)

• (x,y) --> (0.2x,0.2y)

• (x,y) --> (-2x,-2y)

• (x,y) --> (2x,2y)

Which algebraic expression represents this dilation?

The point A (8, 12) was dilated to become point A' (2, 3). What was the scale factor?

• ½

• ¼

• 4

• 2

Dilate Point B by a scale factor of 3:

• (12,0)

• (12,12)

• (4,3)

• (0,12)

What scale factor was used to produce the image?

• 2

• 3

• 1/3

• 1/2

The rule (x, y) --> (1/2x, 1/2y) will produce what type of image?

• Similar figure that is an enlargement

• Similar figure that is a reduction

• Congruent figure

• None

A dilation always produces a congruent figure.

• True

• False

Which rule best represent the dilation applied to triangle ABC to create triangle A'B'C'?

• (x,y) --> (1/2x,1/2y)

• (x,y) --> (1/3x,1/3y)

• (x,y) --> (x+3,y+3)

• (x,y) --> (3x,3y)