Dilations

The point A (8, 12) was dilated to become point A' (2, 3). What was the scale factor? Remember that's the k-value (image/preimage)

• ½

• ¼

• 4

• 2

Tags

CCSS.8.G.A.3

A dilation is which of the following:

• expansion

• contraction

• either a expansion or contraction

• no change

Tags

CCSS.8.G.A.3

When B (4, 9) is under a scale factor of 2, which is B'?

• B' (2 , 4.5)

• B' (-8 ,-18)

• B' (8 ,18)

• B' (9 ,4)

Tags

CCSS.8.G.A.3

When A(3, 6) is under a dilation of 2 what are the coordinates of A'?

• (3, 6)

• (1.5, 3)

• (6, 12)

• (12, 6)

Tags

CCSS.8.G.A.3

A dilation produces a congruent figure (same size & shape).

• True

• False

Tags

CCSS.8.G.A.3

When a dilation has a scale factor greater than one, the dilation is an expansion.

• True

• False

Tags

CCSS.8.G.A.3

When the scale factor of a dilation is greater than zero but less than one, the dilation is a contraction.

• True

• False

Tags

CCSS.8.G.A.3

How do you write the algebraic notation when the scale factor is 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

How do you write the algebraic notation when the scale factor is 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

Which of the following is the algebraic representation for a dilation?

• (x, y) → (x, 3+y)

• (x, y) → (3x, 3y)

• (x, y) → (x, y - 3)

• (x, y) → (.5+x, .4-y)

Tags

CCSS.8.G.A.3