Parallel and Perpendicular Slopes

What is the slope of a line that is perpendicular to the line represented by the equation y = 2x + 4?

• 1/2

• -1/2

• 2

• -2

What is the slope of a line that is perpendicular to the line represented by the equation y = 1/2x + 4?

• -1/2

• -2

• 2

• 1/2

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

• The slopes of two parallel lines are equal.

• The slopes of two parallel lines are negative reciprocals.

• The slopes of two parallel lines are always zero.

• The slopes of two parallel lines are different.

If the slope of a line is m, what is the slope of a line perpendicular to it?

• -1/m

• m

• 1/m

• m^2

What is the definition of perpendicular lines in terms of slope?

• Perpendicular lines have slopes that are equal to each other.

• Perpendicular lines have slopes that are negative reciprocals of each other.

• Perpendicular lines have slopes that add up to one.

• Perpendicular lines have slopes that are positive reciprocals of each other.

If a line has an undefined slope, what can be said about its orientation?

• It is a horizontal line.

• It is a vertical line.

• It is a diagonal line.

• It has no orientation.

If two lines have slopes m1 = 3/4 and m2 = 4/3, how are the lines related?

• Parallel

• Perpendicular

• Neither parallel nor perpendicular.

• Intersecting at an angle

What is the definition of parallel lines in terms of slope?

• Parallel lines have the same slope.

• Parallel lines intersect at a right angle.

• Parallel lines have different slopes.

• Parallel lines are always horizontal.

If two lines have slopes of 5 and -1/5, how are the lines related?

• They are parallel.

• They are perpendicular.

• They are intersecting at an acute angle.

• They are coincident.

What is the slope of a line that is parallel to the line represented by the equation y = -3x + 2?

• -1

• 0

• -3

• 2