Horizontal and Vertical Lines

Front

What is the equation of a vertical line that passes through the point (-2,7)?

Back

x = -2

Front

What is the slope of a vertical line?

Back

The slope is undefined.

Front

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

Back

y = -4

Front

What is the slope of a horizontal line?

Back

The slope is 0.

Front

What type of line has an undefined slope?

Back

A vertical line.

Front

What type of line has a slope of zero?

Back

A horizontal line.

Front

If a line is vertical, what can be said about its x-coordinates?

Back

All x-coordinates are the same.

Front

If a line is horizontal, what can be said about its y-coordinates?

Back

All y-coordinates are the same.

Front

What is the general form of the equation for a vertical line?

Back

x = a (where a is a constant).

Front

What is the general form of the equation for a horizontal line?

Back

y = b (where b is a constant).