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 a horizontal line that passes through the point (0, -1)?

Back

y = -1

Front

What is the equation of a vertical line that passes through the point (4, 0)?

Back

x = 4

Front

What does the equation y = -3 represent?

Back

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

Front

What does the equation x = -4 represent?

Back

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

Front

How can you identify a vertical line from its equation?

Back

If the equation is in the form x = k, it represents a vertical line.

Front

How can you identify a horizontal line from its equation?

Back

If the equation is in the form y = k, it represents a horizontal 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.