This one is a tricky one. Let's see, we know that the second derivative is going to be equal to zero. We know that this is going to be equal to zero for this particular solution. And we know dy dx is equal to m. We know this is m. And so there you have it, we have enough information to solve for m. We know that zero is equal to two minus m. So zero is equal to two minus m. And so we can add m to both sides and we get m is equal to two. So that by itself was quite useful. And then what we could say, let's see, can we solve this further? Well we know that this right over here, dy dx, this is m. This is m. And it's equal to two.