Parallel and Perpendicular Lines

Front

What is the definition of parallel lines?

Back

Parallel lines are lines in a plane that never meet. They have the same slope but different y-intercepts.

Front

What is the definition of perpendicular lines?

Back

Perpendicular lines are lines that intersect at a right angle (90 degrees). The slopes of perpendicular lines are negative reciprocals of each other.

Front

If a line has a slope of m = 2, what is the slope of a line parallel to it?

Back

The slope of a line parallel to it is also 2.

Front

If a line has a slope of m = -3, what is the slope of a line perpendicular to it?

Back

Front

What is the slope of the line represented by the equation y = 4x + 1?

Back

The slope of the line is 4.

Front

Back

The lines are Parallel.

Front

Back

The lines are Perpendicular.

Front

What is the slope of a line parallel to y = -5x + 4?

Back

The slope of a line parallel to it is -5.

Front

What is the slope of a line perpendicular to y = 1/2x + 3?

Back

The slope of a line perpendicular to it is -2.

Front

If two lines have slopes of 1/4 and -4, are they parallel, perpendicular, or neither?

Back

They are Perpendicular.