00:02
Here, we're given the equation of a line, or rather we're asked to find the equation of a line where we're given the graph.
00:09
So what i'm going to do here is note that we want to use point -slope form.
00:13
So that says that y minus y -naught is equal to m times x minus x -naught.
00:24
So m is the slope.
00:27
It's rise over run, change in y over change in x, however you want to look at that.
00:32
So what i'm going to do is i'm going to start at this point and go to this point.
00:37
So i'm going to go up by how much? 1, 2.
00:42
Well, i went from negative 18 to negative 4, so that's up 14.
00:47
So i went up 14.
00:48
And how much do i go over in that amount of time? well, i'm going to go from 0 over to this point, which is at 7.
00:56
So the slope is rise over run, 14 over 7, which is 2...