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 page. It has a slope of 0 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 page. It has an undefined slope and can be represented by the equation x = k, where k is a constant.

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 does the equation y = 1 represent?

Back

The equation y = 1 represents a horizontal line that crosses the y-axis at 1.

Front

What does the equation x = 3 represent?

Back

The equation x = 3 represents a vertical line that crosses the x-axis at 3.

Front

How do you identify a horizontal line on a graph?

Back

A horizontal line on a graph is identified by a constant y-value for all x-values.

Front

How do you identify a vertical line on a graph?

Back

A vertical line on a graph is identified by a constant x-value for all y-values.

Front

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

Back

The equation is y = -1.

Front

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

Back

The equation is x = 2.