Scale Factor

After a dilation with center (0,0), the image of DB is D'B'. If DB = 4.5 and D'B' = 18, the scale factor of this dilation is:

• 1/5

• 5

• 1/4

• 4

Tags

CCSS.8.G.A.3

A line segment is dilated by a scale factor of 2 centered at a point not on the line segment. Which statement regarding the relationship between the given line segment and its image is true?

• The line segments are perpendicular, and the image is one-half of the length of the given line segment.

• The line segments are perpendicular, and the image is twice the length of the given line segment.

• The line segments are parallel, and the image is twice the length of the given line segment.

• The line segments are parallel, and the image is one-half of the length of the given line segment.

Tags

CCSS.8.G.A.3

A three-inch line segment is dilated by a scale factor of 6 and centered at its midpoint. What is the length of its image?

• 9 inches

• 2 inches

• 15 inches

• 18 inches

Tags

CCSS.8.G.A.3