Find the equation of a vertical line passing through the point $( - 1 , - 2 )$ .
A) $y = - x - 2$
B) $x = - y$
C) $y = - 1$
D) $x = - 1$
E) not possible

Question

Find the equation of a vertical line passing through the point $( - 1 , - 2 )$ . 
A) $y = - x - 2$
B) $x = - y$
C) $y = - 1$
D) $x = - 1$
E) not possible

Quizplus · Accepted Answer

A vertical line has an undefined slope and goes straight up and down. Therefore, its equation is of the form x = constant. We know that this line passes through (-1,-2), so the constant must be -1. Thus, the equation of the line is x = -1.

Find the Equation of a Vertical Line Passing Through the Point