Parallel and Perpendicular Lines

Front

What are the slopes of parallel lines?

Back

The slopes of parallel lines are the same.

Front

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

Back

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

Front

Write the equation of a line PARALLEL to y = 4x - 9 that passes through (-2, 4).

Back

y = 4x + 12.

Front

What is the slope of a line that is perpendicular to a line with slope -6?

Back

The slope of a line that is perpendicular to a line with slope -6 is 1/6.

Front

How do you find the equation of a line given a point and a slope?

Back

Use the point-slope form: y - y1 = m(x - x1).

Front

What is the definition of parallel lines?

Back

Parallel lines are lines in a plane that never meet and have the same slope.

Front

What is the definition of perpendicular lines?

Back

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

Front

If two lines have slopes m1 and m2, when are they parallel?

Back

Two lines are parallel if m1 = m2.

Front

If two lines have slopes m1 and m2, when are they perpendicular?

Back

Two lines are perpendicular if m1 * m2 = -1.

Front

Write the equation of a line PERPENDICULAR to y = -6x + 3 that passes through (1, 2).

Back

y = 1/6x + 11/6.