Write an equation of the line with the given properties. Your answer should be written in standard form.

Question

m is undefined passing through P(−7, −9)

Answer 1

"m is undefined" implies that the line is vertical
The equation of a vertical line takes the form x = k, where k is the x value of any point on the line, so ....
x = -7

standard form : x + 0y = -7 if you insist