What are perpendicular lines

The video tutorial explains the differences between parallel and perpendicular lines. It begins with a review of parallel lines, highlighting their constant slopes and different Y intercepts. The focus then shifts to perpendicular lines, which intersect at 90 degrees and can have the same or different Y intercepts. The tutorial emphasizes that perpendicular lines have opposite reciprocal slopes, with one being positive and the other negative. The video concludes with a brief overview of how to find perpendicular lines given an equation and a point.

What is a key characteristic of parallel lines?

• They have the same y-intercept.

• They are always vertical.

• They have the same slope.

• They intersect at a 90-degree angle.

How do perpendicular lines differ from parallel lines in terms of intersection?

• They intersect at a 90-degree angle.

• They intersect at a 45-degree angle.

• They intersect at any angle.

• They never intersect.

Can perpendicular lines have the same y-intercept?

• Yes, they can.

• No, they cannot.

• Only if they are horizontal.

• Only if they are vertical.

What is the relationship between the slopes of perpendicular lines?

• They are opposite reciprocals.

• They are equal.

• They are both negative.

• They are both positive.

If one line has a slope of 3/4, what is the slope of a line perpendicular to it?

• 4/3

• -3/4

• 3/4

• -4/3