Vertical and Horizontal Lines

Front

What is a vertical line in a graph?

Back

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

Front

What is a horizontal line in a graph?

Back

A horizontal line is a straight line that goes left and right on a graph. It has an equation of the form y = b, where 'b' is a constant.

Front

What is the equation of a vertical line that passes through the point (8, 0)?

Back

x = 8

Front

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

Back

y = -4

Front

How do you identify a vertical line on a graph?

Back

A vertical line can be identified by its constant x-value, meaning it does not change as y changes.

Front

How do you identify a horizontal line on a graph?

Back

A horizontal line can be identified by its constant y-value, meaning it does not change as x changes.

Front

What is the slope of a vertical line?

Back

The slope of a vertical line is undefined.

Front

What is the slope of a horizontal line?

Back

The slope of a horizontal line is 0.

Front

If a vertical line is represented by x = 3, what does this mean?

Back

It means that for every point on this line, the x-coordinate is always 3, regardless of the y-coordinate.

Front

If a horizontal line is represented by y = 5, what does this mean?

Back

It means that for every point on this line, the y-coordinate is always 5, regardless of the x-coordinate.