Parallel and Perpendicular Lines

Front

What are parallel lines?

Back

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

Front

What are 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 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 y = 5x - 3?

Back

The slope of the line y = 5x - 3 is 5.

Front

Determine if the lines y = 3/2x + 2 and y = 2/3x + 6 are parallel, perpendicular, or neither.

Back

These lines are neither parallel nor perpendicular.

Front

What is the slope of a line that is perpendicular to y = 2x - 7?

Back

The slope of a line perpendicular to y = 2x - 7 is -1/2.

Front

What is the slope of a line that is parallel to y = 2x - 7?

Back

The slope of a line parallel to y = 2x - 7 is 2.

Front

If two lines have slopes of -2/3 and 3/2, what is their relationship?

Back

These lines are perpendicular.

Front

What is the equation of a line that goes through the point (0, 4) and is parallel to y = 5x - 3?

Back

The equation is y = 5x + 4.