So that's how you could tell it just from the function itself, but you could also tell inflection points by looking at your first derivative. Remember, an inflection point is when our slope goes from increasing to decreasing or from decreasing to increasing. The derivative is just the slope of the tangent line. So this right over here, this is the derivative of our original blue function. So here we can see the interesting parts. And so notice what's happening. On the derivative, the derivative is decreasing, which means the slope of our tangent line of our original function is decreasing, and we saw that.