What is the slope of the line x=9

- What is the slope of the line x 9
- What is the slope of the line x 9 0
- What is the slope of the line represented by x 9
- What is the slope of the line represented by y x 9
- What is the slope of the line y=x/4+9
- What is the slope of line x 3y 9
- What is the slope of the line y-9=-2(x-8)
- What is the slope of a line defined by x 9
- What is the slope of the line y-9=-5/4(x+4)
- What is the slope of the line that is parallel to x 5y 9
- What is the slope of a line perpendicular to y x 9
- Find the slope of the line x 9
- What is the slope of the line described by the equation y-9=-2(x-8)