4.3 Notes - Parallel and Perpendicular Lines

What is the relationship between the slopes of two parallel lines?

• They are opposite reciprocals.

• They are the same.

• They are negative.

• They are undefined.

What is the relationship between the slopes of two perpendicular lines?

• They are the same.

• They are opposite reciprocals.

• Their product is 1.

• One is positive, the other is negative.

Which pair of equations represents perpendicular lines?

• y = (3/4)x + 1 and y = (3/4)x + 4

• y = (2/5)x + 1 and y = (-5/2)x + 6

• y = 3x + 1 and y = 3x - 2

• y = (1/2)x + 5 and y = 2x - 3

What is the equation of the line that is parallel to 3x - y = -4 and passes through the point (-1, 3)?

• y = 3x + 6

• y = 3x - 6

• y = -3x + 6

• y = -3x - 6

What is the slope of a line that is perpendicular to y = -5x - 2?

• -5

• 5

• 1/5

• -1/5

What is the equation of the line that is perpendicular to y = -5x - 2 and passes through the point (6, 4)?

• y = (1/5)x + 14/5

• y = (1/5)x - 14/5

• y = -5x + 34

• y = 5x - 26