Parallel and Perpendicular Slopes

Front

What are parallel lines?

Back

Lines that have the same slope and never intersect.

Front

What are perpendicular lines?

Back

Lines that intersect at a right angle (90 degrees) and have slopes that are opposite reciprocals.

Front

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

Back

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

Front

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

Back

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

Front

What is the slope of the line represented by the equation y = 3x + 5?

Back

The slope is 3.

Front

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

Back

The slope is -2.

Front

Determine if the lines y = 1/3x + 2 and y = 4x + 9 are parallel, perpendicular, or neither.

Back

Neither.

Front

Which line is parallel to y = 2x - 7?

Back

y = 2x - 3.

Front

Which line is perpendicular to y = 2x - 7?

Back

y = -1/2x + 2.

Front

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

Back

The slopes of parallel lines are the same.