00:01
This question gives us the following aggressive model that i've written out there and asks us to explain what the slope means.
00:08
And the best way to see this is by drawing it out.
00:11
So here, this is our graph and we're going to put potassium on the y -axis and fibre on the x -axis.
00:20
As here, potassium is dependent on the fibre.
00:23
Now, this 38 here is what's known as the intercept.
00:27
And let's say, for instance, it's about there.
00:32
And that is where the y -axis, the potassium, is crossed when fibre is zero.
00:37
So, yeah, if you subbed in zero for fibre, you'd still have that 38.
00:43
And the 27 is the important bit for this question, because that is the slope.
00:49
If the slope was, let's say, 1, we might get a line that looks a bit more like this...