Parallel and Perpendicular Lines

Front

What are parallel lines?

Back

Parallel lines are lines in a plane that never meet. They are always the same distance apart.

Front

What are perpendicular lines?

Back

Perpendicular lines are lines that intersect at a right angle (90 degrees).

Front

How do you find the slope of a line?

Back

The slope of a line is found by taking the change in y (rise) divided by the change in x (run).

Front

What is the slope of a line parallel to y = 2x + 3?

Back

The slope of a line parallel to y = 2x + 3 is 2.

Front

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

Back

The slope of a line perpendicular to y = 2x + 3 is -1/2.

Front

Write an equation of a line parallel to y = x - 5 through (1, -2).

Back

y = x - 3.

Front

Write an equation of a line perpendicular to y = 1/3x - 4 through (-3, 2).

Back

y = -3x + 1.

Front

What is the equation of a line parallel to y = 1/3x - 3 through (4, 4)?

Back

y = 1/3x + 8/3.

Front

What is the equation of a line perpendicular to y = 2/7x - 5 through (2, -3)?

Back

y = -7/2x + 4.

Front

What does it mean for two lines to be parallel?

Back

Two lines are parallel if they have the same slope and will never intersect.