Parallel and Perpendicular Lines Quiz

Which of the following pairs of lines are parallel?

Which of the following pairs of lines are perpendicular?

• 5

• -5

• 4

• -4

• Yes

• No

• Yes

• No

If two lines are parallel, what must be true about their slopes?

• The slopes must be equal

• The slopes must be opposite reciprocals

• The slopes must sum up to 0

• The slopes must be different

If two lines are perpendicular, what must be true about their slopes?

• The slopes must be equal

• The slopes must be opposite reciprocals

• The slopes must sum up to 0

• The slopes must be different

• 8

• -8