Given the two points
Find the slope of the line that passes through these two points.
Remember that the slope
Find the slope of the line perpendicular to the line that passes through these two points.
The slopes of perpendicular lines are opposite reciprocals of each other.
Example: lines with slopes of
Remember: the product of opposite reciprocals is
The slope is
Describe the relationship between the slopes of perpendicular lines.
See part (b).