# How do you find the equation of the line perpendicular to x=1 and passing through (-4, -5)?

$y = - 5$
$x = 1$ is a line perpendicular to x- axis, hence a line perpendicular to it would be a line parallel to y axis. The line parallel to y axis and passing through $\left(- 4 , - 5\right)$ would be $y = - 5$
$x = 1$ is a vertical line passing through $1$ on the x axis, so the perpendicular to this is na horizontal one passing throug -5 on the y axis!!!!
So the equation of your line is $y = - 5$