Since the trend of the data is decreasing and convex, and you see it here, it's decreasing, it's definitely decreasing, and convex, it's opening upwards. If you imagine a curve, it looks like it's opening upwards a little bit like that. So, decreasing and convex. She found a decreasing convex exponential model and a decreasing convex quadratic model. So which of the following functions better fits the data? So, function A, this is an exponential, this is the one in green right over here, and function B, this one right over here is a quadratic, and you can see this one in purple. And so, which one of those better fits the data?