Dilations

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

• True
• False

Tags

CCSS.8.G.A.3

What scale factor was used to produce the image?

• 2.5
• 1.5
• 3.5
• 4

Tags

CCSS.8.G.A.4

CCSS.HSG.SRT.A.2

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

CCSS.8.G.A.4

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

CCSS.8.G.A.4

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

• (x, y) → (x, 3y)
• (x, y) → (3x, 3y)
• (x, y) → (x, y - 3)
• (x, y) → (.5x, .4y)

Tags

CCSS.8.G.A.3

Enlargement or reduction?  Find the scale factor!

• It's an enlargement; the scale factor is 1/2.
• It's an enlargement; the scale factor is 2.
• It's a reduction; the scale factor is 1/2.
• It's a reduction; the scale factor is 2.

Tags

CCSS.7.G.A.1

Triangle ABC has vertices A (-2, 2), B (2, 4) and C (3, -1).  What are the coordinates of A' after a dilation by a scale factor of 2.5?

• (-5, 5)
• (5, -5)
• (5, 10)
• (7.5, -2.5)

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

Which could be the rule used to dilate ABC to A'B'C'?

• (5x, 5y)
• (3x, 3y)
• (1/3 x, 1/3 y)
• (2x, 2y)

Tags

CCSS.HSG.CO.A.2

Circle I is dilated to create Circle II.  Which could be the scale factor of the dilation?

• 5
• 3/8
• 8
• 8/3

Tags

CCSS.8.G.A.3

If your SF=0.6, what type of dilation is it?

• enlargement

• reflection

• translation

• reduction

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4