The equation of line XYis (y − 3) = (x − 4). What is the slope of a line perpendicular to XY?

The equation of line XYis (y − 3) = (x − 4). What is the slope of

1.	The equation of line XYis (y − 3) = (x − 4). What is the slope of a line perpendicular to XY?
Answer» The slope of the line perpendicular to XY is -1. Perpendicular lines are those lines that intersect at 90 degrees. Let's see how we can find the slope of a line perpendicular to another line.