00:01
So what does it mean of two lines are parallel? what does it say about their slopes? well, they never intersect.
00:07
So actually, they have the same steepness of the lines that the slopes are equal.
00:13
Versus perpendicular, two lines intersect in a 90 degree angle.
00:18
What does this say about their slopes? well, they're different, specifically how.
00:22
The slopes are opposite reciprocals.
00:28
What does that mean? okay, so if one slope is positive 3 over 2, opposite of positive, negative, the other slope reciprocal will be negative 2 thirds in order for them to intersect at a 9 degree angle.
00:41
So suppose i have the equation x plus 2y equals 3.
00:48
I want to find the slope of this line.
00:50
How do i do that? well, one way is to get it in slope intercept form, y equals mx plus b, and find the value in front of my m.
00:59
So find the value of x.
01:01
So get y by itself, so subtract 2x.
01:05
Can i combine an x in 3? nope, so negative x plus 3 or 3 minus x doesn't matter...