Math Dilation

Dilate Point B by a scale factor of 3:

• (12,0)

• (12,12)

• (4,3)

• (0,12)

Dilate Point B by a scale factor of 1/2

• (1.5,-4)

• (-1.5,1)

• (-1,-1.5)

• (-2,-2)

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)

The scale factor for this dilation is:

Mathematical Equivalence

ON

What is the effect of a dilation with a scale factor of 2 on a figure?

• The figure becomes twice as large.

• The figure becomes half as large.

• The figure's orientation changes.

• The figure's position changes.

• It doubles in size.

• It remains the same size.

• It becomes half the size.

• It becomes four times the size.

Is the following a dilation?

• Yes

• No

Triangle ABC is dilated using a scale factor of 1/2. What are the new coordinates of point A'?

• (-3, 3)

• (-12, 12)

• (-2, 2)

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

A scale factor of less than one means

• that the image will be larger than the pre-image.

• That the image will be the same as the pre-image.

• That you need to subtract that amount off  of each side.

• That the image will be a reduction of the pre-image.