And the slope of this line, it looks like for every time we move one in the x direction, we're moving two in the y direction. Delta y is equal to two when delta x is equal to one. So our change in y with respect to x, at least for this tangent line here, which would represent our change in y with respect to x right at that point, is going to be equal to two over one, or two. And they told us to estimate it, but all of these are way off. Having a negative two derivative would mean that as we increase our x, our y is decreasing. So if our curve looks something like this, we would have a slope of negative two. If having slopes in this, a positive of.1, that would be very flat.