Parallel and Perpendicular Slopes

Front

What is the definition of parallel lines in terms of slope?

Back

Parallel lines have the same slope but different y-intercepts.

Front

What is the definition of perpendicular lines in terms of slope?

Back

Perpendicular lines have slopes that 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 a vertical line?

Back

The slope of a vertical line is undefined.

Front

What is the slope of a horizontal line?

Back

The slope of a horizontal line is 0.

Front

How do you determine if two lines are parallel using their equations?

Back

Two lines are parallel if their slopes are equal.

Front

How do you determine if two lines are perpendicular using their slopes?

Back

Two lines are perpendicular if the product of their slopes is -1.

Front

What is the slope-intercept form of a line?

Back

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

Front

Given the equation y = 2x + 3, what is the slope?

Back

The slope is 2.