WU: Parallel and Perpendicular Lines

Front

What is the relationship between the slopes of two perpendicular lines?

Back

The slopes of two perpendicular lines are negative reciprocals of each other.

Front

What is the relationship between the slopes of two parallel lines?

Back

The slopes of two parallel lines are the same.

Front

Given the equations y = 6x + 2 and y = -6x + 2, what can be said about these lines?

Back

These lines are neither parallel nor perpendicular.

Front

What is the slope of a horizontal line?

Back

The slope of a horizontal line is 0.

Front

What is the slope of a vertical line?

Back

The slope of a vertical line is undefined.

Front

How do you find the slope of a line given two points (x1, y1) and (x2, y2)?

Back

The slope (m) is calculated as m = (y2 - y1) / (x2 - x1).

Front

What is the slope-intercept form of a linear equation?

Back

The slope-intercept form is y = mx + b, where m is the slope and b is the y-intercept.

Front

If two lines have slopes m1 and m2, under what condition are they parallel?

Back

Two lines are parallel if m1 = m2.

Front

If two lines have slopes m1 and m2, under what condition are they perpendicular?

Back

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

Front

What does it mean for two lines to be neither parallel nor perpendicular?

Back

It means that the lines intersect at an angle that is not 90 degrees and do not have the same slope.