Its trend is opposite. Over that interval, it's going from being negative to positive as opposed to going from positive to negative. So we can rule out the blue graph as being the derivative of the orange graph. But what about this magenta graph? It does have, it does look like it has the right trend. In fact, it intersects the x-axis at the right place, right over there. And at least over this interval, it seems it's positive from here to here.