And let's say that the graph of a particular solution to this the graph of a particular solution passes through the point one comma negative one. So my question to you is, what is y, what is y when x is equal to three for this particular solution? So the particular solution to the differential equation that passes through the point one comma negative one, what is y when x is equal to three? And I encourage you to pause the video and try to work through it on your own. So I'm assuming you had a go at it and the key with a separable differential equation, and that's a big clue, that even calling it a separable differential equation is that you separate the x's from the y's, or all the x's and the dx's from the y's and dy's. So how do you do that here? Well, what I could do, let me just rewrite it.