So I'm feeling pretty good about this, especially if we can knock this one out here, if we can knock that one out. So dy dx is equal to x over y. Well then when x equals one, y equals one, dy dx would be equal to one. And this slope looks larger than one. It looks like two, but since we're really just eyeballing it, let's see if we can find something that more clearly, where this more clearly falls apart. So let's look at the situation when, let's look at the situation when they both equal negative one. So x equals negative one and y is equal to negative one.