Dilation Rules

Dilation rules use ______________ to change the ___________ of a shape. 

• addition; location

• division; direction

• subtraction; orientation

• multiplication; size

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)

(x, y) -> (2x, 2y) 
What is the coefficient 2 mean?

• plot 2 to the right and 2 up

• scale factor is 2 creating a new figure half the size

• scale factor is 2 making a figure twice the 
  original

• I don't understand this question : ( 

If the scale factor is greater than one, the new figure will be

• reduction

• enlargement

• scale

• not proportional

If the scale factor is less than one(typically a proper fraction), the new figure will be

• an enlargement

• a reduction

• a scale factor

• bigger

Dilate Point B by a scale factor of 3:

• (12,0)

• (12,12)

• (4,3)

• (0,12)

If a dilation produces a congruent figure, then the scale factor was equal to _____

• 1/2

• 2

• 10

• 1

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

• True

• False

Is this an enlargement or a reduction?

• Enlargement

• Reduction

Is this an enlargement or a reduction?

• Enlargement

• Reduction