Horizontal and Vertical Lines

Front

What is a horizontal line?

Back

A horizontal line is a straight line that runs from left to right across the graph. It has a constant y-value and can be represented by the equation y = k, where k is a constant.

Front

What is a vertical line?

Back

A vertical line is a straight line that runs up and down the graph. It has a constant x-value and can be represented by the equation x = k, where k is a constant.

Front

What is the equation of the horizontal line that passes through the point (0, 1)?

Back

y = 1

Front

What is the equation of the vertical line that passes through the point (2, 0)?

Back

x = 2

Front

How do you identify a horizontal line on a graph?

Back

A horizontal line can be identified by its flat appearance, running parallel to the x-axis, and having the same y-coordinate for all points on the line.

Front

How do you identify a vertical line on a graph?

Back

A vertical line can be identified by its straight up-and-down appearance, running parallel to the y-axis, and having the same x-coordinate for all points on the line.

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

If the equation of a line is y = -3, what type of line is it?

Back

It is a horizontal line.

Front

If the equation of a line is x = 5, what type of line is it?

Back

It is a vertical line.