00:01
Okay, undefined slope simply means the line has to be vertical like this.
00:06
That has an undefined slope.
00:10
Otherwise you're going to have a plus slope, a minus slope or zero slope.
00:14
Only vertical is undefined.
00:16
Now, we are going through the point, negative 1, negative 4.
00:21
So that will be about here, negative 1, negative 4, like graph it on the x, y axes.
00:29
So, the line then has to go through that point and be vertical, and which means it will cut here at negative 1 on the x -axis...