Equations of Parallel and Perpendicular Lines

Front

What is the slope of a line that is parallel to another line?

Back

The slopes of parallel lines are equal.

Front

What is the slope of a line that is perpendicular to another line?

Back

The slopes of perpendicular lines are negative reciprocals of each other.

Front

Back

'm' represents the slope of the line.

Front

Back

'b' represents the y-intercept of the line.

Front

Back

Front

Back

Front

What is the general form of the equation of a horizontal line?

Back

Front

What is the general form of the equation of a vertical line?

Back

Front

Back

They are parallel because they have the same slope.

Front

Back

They are perpendicular because their slopes are negative reciprocals.