Dilation, Similarity, and Slope Quiz

Which of the following transformations is a dilation?

• Rotating a shape 90 degrees

• Enlarging a shape by a scale factor of 2

• Reflecting a shape over the x-axis

• Translating a shape 5 units to the right

What does it mean for two shapes to be similar?

• They have the same size and shape

• They have the same shape but not necessarily the same size

• They have the same size but different shapes

• They have different sizes and shapes

Calculate the slope of a line that passes through the points (2, 3) and (4, 7).

• 1

• 2

• 3

• 4

• A line that rises 1 unit for every 2 units it runs

• A line that rises 2 units for every 1 unit it runs

• A line that falls 1 unit for every 2 units it runs

• A line that falls 2 units for every 1 unit it runs

If a triangle is dilated by a scale factor of 3, what happens to the length of its sides?

• The sides become 3 times longer

• The sides become 3 times shorter

• The sides remain the same length

• The sides double in length