Horizontal and Vertical Lines

Front

What is a vertical line in a coordinate plane?

Back

A vertical line is a line that goes straight up and down and has an equation of the form x = a, where 'a' is a constant.

Front

What is a horizontal line in a coordinate plane?

Back

A horizontal line is a line that goes straight across and has an equation of the form y = b, where 'b' is a constant.

Front

What does the equation x = 4 represent?

Back

It represents a vertical line that passes through the point (4, y) for all values of y.

Front

What does the equation y = 8 represent?

Back

It represents a horizontal line that passes through the point (x, 8) for all values of x.

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 is the equation of a horizontal line that passes through the point (6, 7)?

Back

The equation is y = 7.

Front

What is the equation of a vertical line that passes through the point (4, 5)?

Back

The equation is x = 4.

Front

How can you identify a horizontal line on a graph?

Back

A horizontal line runs parallel to the x-axis and does not rise or fall.

Front

How can you identify a vertical line on a graph?

Back

A vertical line runs parallel to the y-axis and does not move left or right.