Parallel & Perpendicular Lines Review

Front

What are parallel lines?

Back

Parallel lines are lines in a plane that never meet. They have the same slope but different y-intercepts.

Front

What are perpendicular lines?

Back

Perpendicular lines are lines that intersect at a right angle (90 degrees). The slopes of perpendicular lines are negative reciprocals of each other.

Front

If two lines have the same slope, what can we say about them?

Back

If two lines have the same slope, they are parallel.

Front

What is the slope of a line parallel to y = 2x + 5?

Back

The slope of a line parallel to y = 2x + 5 is 2.

Front

What is the slope of a line perpendicular to y = -3x + 1?

Back

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

Front

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

Back

Two lines are parallel if their equations have the same slope.

Front

What is the slope of the line represented by the equation y = 4x - 7?

Back

The slope of the line is 4.

Front

If the slope of a line is 0, what type of line is it?

Back

A line with a slope of 0 is a horizontal line.

Front

If the slope of a line is undefined, what type of line is it?

Back

A line with an undefined slope is a vertical line.

Front

What is the equation of a line parallel to y = 3x + 1 that passes through the point (2, 5)?

Back

The equation is y = 3x - 1.