00:02
Alright, this question is asking if the graphs of two linear functions are perpendicular, describe the relationship between the slopes and the y -intercepts.
00:11
Well, the only requirement for these lines that are perpendicular to each other is perpendicular lines have opposite reciprocal slopes.
00:21
So what that means is if the slope is 1 -half, then the line that is perpendicular to that, that's the symbol for perpendicular in geometry, it's going to be opposite reciprocal.
00:32
So opposite making it negative and the reciprocal of 1 over 2 is 2 over 1.
00:37
I'll do another one.
00:38
If the slope is, i don't know, negative 3 -fifths, then the slope that is perpendicular to that will be a positive 5 -thirds.
00:47
So the slopes are going to be opposite reciprocals of each other.
00:51
Sometimes they call this m, and then the other one's going to be negative 1 over m...