The equation of line XY is (y − 3) = (x − 4). What is the slope of a line perpendicular to XY?
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.
Answer: The slope of the line perpendicular to XY is -1.
Let's understand the problem in detail.
To find the slope of a line perpendicular to another line we will use the formula below
m1m2 = -1, where m1 is the slope of the first line and m2 is the slope of the second line.
Here, the line given is (y − 3) = (x − 4).
If we write it as y = mx + c, we get y = x - 1.
Hence, the slope of the line is 1. Let it be m1 = 1
Now, to find the slope of perpendicular line (m2), we use m1m2 = -1
Thus, we get m2 = -1.