Parallel and Perpendicular Lines

Front

What is the slope of a line parallel to a line with slope m?

Back

The slope of a line parallel to a line with slope m is also m.

Front

What is the slope of a line perpendicular to a line with slope m?

Back

The slope of a line perpendicular to a line with slope m is -1/m.

Front

If two lines have the same slope, what can we say about their relationship?

Back

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

Front

If two lines have slopes that are negative reciprocals of each other, what can we say about their relationship?

Back

If two lines have slopes that are negative reciprocals of each other, they are perpendicular.

Front

What is the slope of the line represented by the equation y = mx + b?

Back

The slope of the line represented by the equation y = mx + b is m.

Front

How can you determine if two lines are parallel using their equations?

Back

Two lines are parallel if their slopes are equal.

Front

How can you determine if two lines are perpendicular using their equations?

Back

Two lines are perpendicular if the product of their slopes is -1.

Front

What is the slope of the line y = 3x + 4?

Back

The slope of the line y = 3x + 4 is 3.

Front

What is the slope of the line y = -2x + 5?

Back

The slope of the line y = -2x + 5 is -2.

Front

Given the lines y = 1/2x + 3 and y = 1/2x - 1, what can we conclude about them?

Back

The lines y = 1/2x + 3 and y = 1/2x - 1 are parallel.