Dilations

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

Tags

CCSS.8.G.A.3

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

• addition 
• subtraction 
• multiplication 
• division 

Tags

CCSS.8.G.A.3

What is the scale factor from ABCD to MNOP?

• 2/3
• 3/2
• 2
• 3

Tags

CCSS.7.G.A.1

A dilation is given by the transformation (x, y) → (2.5x, 2.5y). What is the scale factor?

• 2.5
• 1/2.5
• This is not a dilation
• The scale factor cannot be determined

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

If the scale factor is greater than 1, the dilation is...

• an enlargement
• a rotation
• a translation
• a reduction

Tags

CCSS.8.G.A.3

Which algebraic expression could be the rule for a reduction?

• (x, y)→(2x, 2y)
• (x, y)→(5/2 x, 5/2 y)
• (x, y) →(0.5x, 0.5y)
• (x, y)→(5x, 5y)

Tags

CCSS.HSG.CO.A.2

Enlargement or reduction?  Find the scale factor!

• It's an enlargement; the scale factor is 3.
• It's a reduction; the scale factor is 1/3.
• It's a reduction; the scale factor is 1/2.
• It's an enlargement; the scale factor is 2. 

Tags

CCSS.8.G.A.3