dil2

A dilation is which of the following:

• only an enlargement

• neither an enlargement or reduction

• only a reduction

• both an enlargement and a reduction

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

• True

• False

Definition: The figure after a transformation has occurred.

• image

• pre-image

A dilation is given by the transformation (x, y) → (.75x, .75y). What type of dilation is this?

• enlargement

• it is not a dilation

• reduction

A dilation produces a similar figure

• True

• False

Choose the correct scale factor:

• 2
• 3
• 1/3
• 1/2

A triangle has vertices with coordinates (2,0), (3, -1) and (-2,-5). If the triangle is dilated by a scale factor of 3 with the origin as the center of dilation, what are the coordinates of the vertices of the image?

• (5,3), (6,2), (1,-2)
• (6,0), (9,-3), (-6,-15)
• (2/3,0), (1,-1/3), (-2/3,-5/3)
• (-1,-3), (0,-4), (-5,-8)

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)

Choose the correct scale factor:

• 2
• 3
• 1/3
• 1/2

Dilate Point B by a scale factor of 1/2

• (1.5,-4)
• (-1.5,1)
• (-1,-1.5)
• (-2,-2)