Dilation and Scale Factor

What scale factor was used to produce the image?

• 2
• -2
• ¹/₂
• 1

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

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.8.G.A.3

CCSS.8.G.A.4

What is the scale factor?

• 1/2

• 2

• 4

• None of the above

Tags

CCSS.8.EE.B.6

CCSS.8.G.A.3

CCSS.8.G.A.4

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)

Tags

CCSS.8.G.A.3

Triangle ABC was dilated to create triangle A’B’C’.  The table below shows to coordinates of the original triangle and its dilation.
Which algebraic rule represents the dilation?

• (x, y)--> (3x, 3y) 
• (x, y)--> (6x, 10y)
• (x, y)--> (2x, 2y)
• (x, y)--> (1/2x,  1/2y)

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

What is Dilation?

• Dilation means to enlarge or reduce
• Dilation means to reflect on something
• Dilation means to like something
• Dilation means to make something different by making it smaller

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

The __________ is the ratio of a length of the image to the corresponding length on the original figure.

• reduction
• enlargement
• scale factor
• center of dilation

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

A scale factor of less than one means

• that the prime image will be larger than the pre-image.
• That the prime image will be the same as the preimage.
• That you need to subtract that amount off  of each side.
• That the prime image will be a reduction of the preimage.

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

What is the scale factor from the small shape to the big shape?

• 1/2
• 7/3
• 2
• 10/3

Tags

CCSS.8.G.A.3

CCSS.8.G.A.4

State the coordinate of the image of the given point B (4,9) under a dilation with center at the origin with the given scale factor of 2.

• B' (2 , 4.5)

• B' (-8 ,-18)

• B' (8 ,18)

• B' (9 ,4)

Tags

CCSS.8.G.A.3