It needs to cross it. So you might say, well, what about this point right over here, two comma zero? The second derivative touches the x-axis there, but it doesn't cross it. So we never go from our derivative increasing to our derivative decreasing. So big takeaways, you can figure out the inflection point from either the graph of the function, from the graph of the derivative, or the graph of the second derivative. On the function itself, you just wanna inspect the slopes of the tangent line and think about where does it go from decreasing to increasing, or the other way around, from increasing to decreasing. If you're looking at the first derivative, you really just wanna look at minimum or maximum points.