Parallel and Perpendicular Slopes

Front

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

Back

Parallel lines have the same slope.

Front

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

Back

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

Front

If a line has a slope of 3, what is the slope of a line parallel to it?

Back

The slope of a line parallel to it is also 3.

Front

If a line has a slope of -4, what is the slope of a line perpendicular to it?

Back

The slope of a line perpendicular to it is 1/4.

Front

What is the slope of the line represented by the equation y = 5x + 1?

Back

The slope is 5.

Front

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

Back

Two lines are parallel if their slopes are equal.

Front

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

Back

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

Front

What is the slope of the line represented by the equation y = -2x + 4?

Back

The slope is -2.

Front

Given the equations y = 2x + 1 and y = 2x - 5, are these lines parallel or perpendicular?

Back

These lines are parallel.

Front

Given the equations y = 1/2x + 3 and y = -2x + 1, are these lines parallel or perpendicular?

Back

These lines are perpendicular.