Opposite Reciprocal

What is the relationship between the slopes of parallel lines?

• They are undefined.

• They are opposite reciprocals.

• They are the same.

• They are both zero.

How do you find the perpendicular slope of a line with a slope of 3/4?

• Change the sign only.

• Flip the fraction only.

• Keep the same slope.

• Change the sign and flip the fraction to get -4/3.

What happens when you try to find the perpendicular slope of a line with a slope of zero?

• It stays the same.

• It becomes undefined.

• It becomes one.

• It becomes zero.

If a line has a slope of -8, what is the slope of a line perpendicular to it?

• 8

• -8

• -1/8

• 1/8

For a slope of -31/4, what is the perpendicular slope?

• -4/31

• 4/31

• 31/4

• -31/4