Vertical and Horizontal Lines

Front

What is the equation of a horizontal line?

Back

y = c, where c is a constant.

Front

What is the equation of a vertical line?

Back

x = c, where c is a constant.

Front

Which type of line has a slope of 0?

Back

Horizontal line.

Front

Which type of line has an undefined slope?

Back

Vertical line.

Front

What does the graph of y = 1 look like?

Back

A horizontal line that crosses the y-axis at 1.

Front

What does the graph of x = 2 look like?

Back

A vertical line that crosses the x-axis at 2.

Front

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

Back

All points on the line have the same x-coordinate.

Front

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

Back

All points on the line have the same y-coordinate.

Front

What is the slope of a horizontal line?

Back

0.

Front

What is the slope of a vertical line?

Back

Undefined.