Horizontal and Vertical Lines

Front

What is the equation of a horizontal line?

Back

The equation of a horizontal line is of the form y = k, where k is a constant.

Front

What is the equation of a vertical line?

Back

The equation of a vertical line is of the form x = h, where h is a constant.

Front

How do you identify a horizontal line on a graph?

Back

A horizontal line runs parallel to the x-axis and has a constant y-value.

Front

How do you identify a vertical line on a graph?

Back

A vertical line runs parallel to the y-axis and has a constant x-value.

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 graph of y = 3 look like?

Back

The graph of y = 3 is a horizontal line that crosses the y-axis at 3.

Front

What does the graph of x = 5 look like?

Back

The graph of x = 5 is a vertical line that crosses the x-axis at 5.

Front

What is the relationship between the slope and the type of line?

Back

Horizontal lines have a slope of 0, while vertical lines have an undefined slope.

Front

How can you determine if a line is horizontal or vertical from its equation?

Back

If the equation is in the form y = k, it is horizontal; if it is in the form x = h, it is vertical.