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

What is the slope of a horizontal line?

Back

0

Front

What is the slope of a vertical line?

Back

Undefined

Front

Which type of line runs parallel to the x-axis?

Back

Horizontal line

Front

Which type of line runs parallel to the y-axis?

Back

Vertical line

Front

What is the graph of y = -4?

Back

A horizontal line that crosses the y-axis at -4.

Front

What is the graph of x = 2?

Back

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

Front

If a line has a slope of 0, what type of line is it?

Back

A horizontal line.

Front

If a line has an undefined slope, what type of line is it?

Back

A vertical line.