Warm UP: Day 2 Dilations

The point (8, 12) was dilated from the origin to become point (2, 3). What was the scale factor?

• ½

• ¼

• 4

• 2

If the origin is the center of this dilation, choose the correct scale factor:

• 2

• 3

• 1/3

• 1/2

How do you write the algebraic notation for a dilation from the origin with a scale factor of 3?

• (x, y) --> (1/3x, 1/3y)

• (x, y) --> (-3x, -3y)

• (x, y) --> (x + 3, y + 3)

• (x, y) --> (3x, 3y)

Is this an enlargement or a reduction? What is the scale factor if the origin is the center of dilation?

• It's a reduction; the scale factor is 2.

• It's an enlargement; the scale factor is 2.

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

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

Which of the following statements is true about the scale factor (k) for this dilation?

In this figure, triangle ABC is the ​ (a)   and triangle A'B'C' is the ​ (b)   . The scale factor for this dilation is ​ (c)   . A(n) ​ (d)   occurred.

• pre-image
• image
• 2
• reduction
• enlargement
• None of the above
• 1/2

State the coordinates of point C after a dilation with a scale factor of 1/2 and center of dilation at point P.

• (-6, 1)

• (-3, -2)

• (1, -6)

• (-2, -3)