Horizontal and Vertical Lines

Front

What is the definition of a horizontal line in a coordinate plane?

Back

A horizontal line is a straight line that runs left to right across the coordinate plane and has a slope of 0.

Front

What is the definition of a vertical line in a coordinate plane?

Back

A vertical line is a straight line that runs up and down the coordinate plane and has an undefined slope.

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

What is the general equation of a vertical line?

Back

The general equation of a vertical line is x = a, where 'a' is the x-coordinate of any point on the line.

Front

What is the general equation of a horizontal line?

Back

The general equation of a horizontal line is y = b, where 'b' is the y-coordinate of any point on the line.

Front

How do you determine if two lines are parallel?

Back

Two lines are parallel if they have the same slope.

Front

What is the relationship between the slopes of perpendicular lines?

Back

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

Front

If a line passes through the point (4, -4) and is parallel to the x-axis, what is its equation?

Back

The equation of the line is y = -4.

Front

If a line passes through the point (6, 2) and is vertical, what is its equation?

Back

The equation of the line is x = 6.