Identifying Parallel & Perpendicular Lines

Front

What defines parallel lines in terms of their slopes?

Back

Parallel lines have the same slope.

Front

What defines perpendicular lines in terms of their slopes?

Back

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

Front

Given the equations y = -3/4x - 2 and y = 1/3x + 1, how would you classify these lines?

Back

These lines are neither parallel nor perpendicular.

Front

If a line has the equation y = -3x - 4, what is the slope of a line that is parallel to it?

Back

The slope of a parallel line is -3.

Front

If a line has the equation y = -3x - 4, what is the slope of a line that is perpendicular to it?

Back

The slope of a perpendicular line is 1/3.

Front

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

Back

The slopes of two parallel lines are equal.

Front

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

Back

The product of the slopes of two perpendicular lines is -1.

Front

How can you determine if two lines are parallel by looking at their equations?

Back

If the lines have the same slope, they are parallel.

Front

How can you determine if two lines are perpendicular by looking at their equations?

Back

If the slopes are negative reciprocals, the lines are perpendicular.

Front

What is the slope of the line represented by the equation y = 2x + 10?

Back

The slope is 2.