Is it possible to write the equation of every line in slope-intercept form? Complete the reasoning. (Yes or no) possible to write the equation of a vertical line in slope-intercept form. The equation of a vertical line has a form x = a, where a is a real number. The slope of a vertical line is undefined, so there is no value that can be substituted for m.

The equation of every other line, including horizontal lines, (can or cannot) be written in slope-intercept form.

A (horizontal or vertical) line has an equation of the form, y = ___?