Vertical and Horizontal Lines

Front

What is a vertical line?

Back

A vertical line is a straight line that runs up and down, parallel to the y-axis. It has an undefined slope.

Front

What is a horizontal line?

Back

A horizontal line is a straight line that runs left to right, parallel to the x-axis. It has a slope of 0.

Front

What does the equation x = 4 represent?

Back

A vertical line that crosses the x-axis at 4.

Front

What does the equation y = -3 represent?

Back

A horizontal line that crosses the y-axis at -3.

Front

What is the slope of a vertical line?

Back

Undefined.

Front

What is the slope of a horizontal line?

Back

0.

Front

Which type of line runs parallel to the y-axis?

Back

Vertical line.

Front

Which type of line runs parallel to the x-axis?

Back

Horizontal line.

Front

What is the graph of x = -4?

Back

A vertical line that crosses the x-axis at -4.

Front

What is the graph of y = 2?

Back

A horizontal line that crosses the y-axis at 2.