Question

Find the equation of the line described in standard form containing (-12,15) and undefined slope

Answer 1

Since the line has a undefined slope this means that this line is vertical. The equation of a vertical line is:

$x=a$

where a is the value where the line intercepts with the x-axis. This value is the same for all the points in the line, hence in this case a=-12. Therefore the equation of the line we are looking for is:

$x=-12$