Parallel and Perpendicular Lines

Front

What are the slopes of parallel lines?

Back

Identical.

Front

What are the slopes of perpendicular lines?

Back

Opposite reciprocals.

Front

If a line is parallel to y = 2x - 7, what is its slope?

Back

2

Front

If a line is perpendicular to y = 2x - 7, what is its slope?

Back

-1/2

Front

Are the lines y = 5/7x + 2 and y = 5/7x - 30 parallel, perpendicular, or neither?

Back

Parallel.

Front

Define parallel lines.

Back

Lines that never intersect and have the same slope.

Front

Define perpendicular lines.

Back

Lines that intersect at a right angle (90 degrees) and have slopes that are opposite reciprocals.

Front

What is the slope of a line that is perpendicular to a line with a slope of 3?

Back

-1/3.

Front

What is the slope of a line that is parallel to a line with a slope of -4?

Back

-4.

Front

If two lines have slopes of 1/2 and -2, are they parallel, perpendicular, or neither?

Back

Perpendicular.