OG详解-OG6 数学1 Q2

Choice D is correct. An appropriate model should follow the trend of the data points and should have data points both above and below the model. The scatterplot shows that the data points have an increasing trend that is curved. Therefore, an appropriate model should be an increasing curve with data points both above and below the model. Of the given choices, only the model in choice D is an increasing curve with data points both above and below the model.
Choice A is incorrect. Since the trend of the data points isn’t linear, a line isn’t the most appropriate model for the data. Choice B is incorrect. Since the trend of the data points is increasing and isn’t linear, a decreasing line isn’t the most appropriate model for the data. Choice C is incorrect. All the data points are below the model shown in this graph.