Finding Equations of Parallel and Perpendicular Lines

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

• They have slopes that add up to zero.

• They have the same slope.

• They have slopes that are negative reciprocals.

• They have slopes that multiply to one.

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

• They have slopes that are negative reciprocals.

• They have the same slope.

• They have slopes that multiply to one.

• They have slopes that add up to zero.

Given the line y = 3x - 1, what is the slope of a line parallel to it?

• 3

• 0

• -3

• 1

If a line passes through the point (8, -29) and is parallel to y = 3x - 1, what is its equation?

• y = -3x + 5

• y = -3x - 5

• y = 3x + 5

• y = 3x - 5

What is the negative reciprocal of the slope 4/5?

• -5/4

• 5/4

• 4/5

• -4/5

Given the line y = 4/5x + 4, what is the slope of a line perpendicular to it?

• -4/5

• -5/4

• 4/5

• 5/4

If a line passes through the point (8, -2) and is perpendicular to y = 4/5x + 4, what is its equation?

• y = -5/4x + 8

• y = 5/4x - 8

• y = -5/4x - 8

• y = 5/4x + 8

What is the equation of a horizontal line passing through the point (3, -7)?

• y = -7

• x = -7

• y = 3

• x = 3

What is the slope of any horizontal line?

• One

• Infinity

• Zero

• Undefined

If a line is parallel to y = -3 and passes through (3, -7), what is its equation?

• y = -7

• x = -7

• y = -3

• x = 3