The slope of the horizontal line is
- The slope of the horizontal line is zero
- The slope of horizontal line is 0
- The slope of a vertical line is the slope of a horizontal line is
- The slope of horizontal line is undefined
- The slope of the horizontal line y 8 is
- The slope of the horizontal line x axis is
- The slope of a horizontal line is always equal to zero
- The slope of any horizontal line is
- The slope of a horizontal line is always
- The slope of a horizontal line is ▼
- The slope of every horizontal line is
- The slope of every horizontal line is unknown
- The slope of a horizontal line is blank
- The slope of a horizontal line is called
- The slope of any horizontal line is 0