What is the equation of the line passing through (-, ) that is perpendicular to the line y = ?

The line y= is a horizontal line.

A line perpendicular to it is vertical.

Since it passes through (–, ),

the equation is x = –.

y = is the equation of a horizontal line, so a line

perpendicular to it is a vertical line.

Vertical lines have the equation x = __, and since this one

passes thru (- , ), its equation is x = – .