It's going to be two times zero minus negative one, which is going to be equal to a slope of one, which is going to look like this. It should be the same, it should be parallel to what we have right over there. And we're done. Alright, let's do part b now. Find the second derivative of y with respect to x in terms of x and y. Determine the concavity of all solutions for the given differential equation in quadrant two. Give a reason for your answer.