Slope Concepts

Front

Slope-Intercept Form

Back

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

Front

Slope of a Vertical Line

Back

The slope of any vertical line is undefined.

Front

Slope of a Horizontal Line

Back

The slope of any horizontal line is 0.

Front

Increasing Line

Back

An increasing line has a positive slope.

Front

Decreasing Line

Back

A decreasing line has a negative slope.

Front

What is the slope of the line: y = -4

Back

The slope is 0.

Front

Find the slope of the line x = -7.

Back

The slope is undefined.

Front

Definition of parallel lines.

Back

Two nonvertical lines are parallel if they have the same slope and different y-intercepts.

Front

Definition of perpendicular lines.

Back

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

Front

What is important to know about parallel and perpendicular lines?

Back

Parallel lines have the same slope. Perpendicular lines have slopes that are negative reciprocals.