One can easily describe the characteristics of the straight line even without seeing its graph because the slope and y-intercept can easily be identified or read off from this form. Where m is the slope of the line and b is the intercept. The one thing that is true about vertical lines is that the x value is constant.
Equation of a line.
If the slope of a line is undefined then the line is a vertical line so it cannot be written in slope-intercept form but it can be written in the form. The one thing that is true about vertical lines is that the x value is constant. So slope of given line is 12. The equation can be in any form as long as its linear and and you can find the slope and y-intercept.