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.

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 the slope of a 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 a 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 y = 2x - 7?

Back

The slope is 2.

Front

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

Back

They are perpendicular.

Front

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

Back

The slope is -1/2.

Front

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

Back

The slope is 2.

Front

Which equation represents a line parallel to y = 5x - 3 that passes through (0, 4)?

Back

y = 5x + 4.

Front

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

Back

They are neither.