Write the equation of a line through a point perpendicular to another line

The video tutorial explains the concept of perpendicular lines and their slopes, focusing on the idea of opposite reciprocals. It compares perpendicular lines to parallel lines, which have the same slope, and provides an example to illustrate how to calculate the opposite reciprocal slope. The tutorial also demonstrates how to apply this concept to equations, emphasizing the importance of flipping the slope and changing its sign.

What is the relationship between the slopes of parallel lines?

• They are perpendicular.

• One is double the other.

• They are equal.

• They are opposite reciprocals.

If a line has a slope of -4/5, what is the slope of a line perpendicular to it?

• -4/5

• 5/4

• -5/4

• 4/5

What happens to the sign of the slope when finding the opposite reciprocal?

• It becomes zero.

• It remains the same.

• It changes to the opposite sign.

• It doubles.

How can the slope of 1 be rewritten to find its opposite reciprocal?

• As 2/1

• As 0/1

• As 1/1

• As -1/1

What is the opposite reciprocal of a slope of 1?

• 2

• 0

• -1

• 1