1. A method of automatically generating statistical models for a dataset, comprising: at a computer system having one or more processors and memory storing programs executed by the one or more processors: receiving a user description of a graphical view of a dataset, wherein the user description specifies a relationship between a first field and a second field of the dataset; rendering a graphical visualization of the relationship between the first field and the second field of the dataset using data values associated with the first and second fields in the graphical view of the dataset; receiving a user instruction to render a statistical model on top of the graphical visualization of the relationship between the first field and the second field of the dataset using data values associated with the first and second fields in the graphical view of the dataset; in response to the user instruction: determining a set of data properties for each of the first and second fields; and determining whether there is a mathematical formula describing the relationship between the first field and the second field of the dataset in accordance with the respective set of data properties; and when there is a mathematical formula describing the relationship between the first field and the second field of the dataset: generating one or more statistical models of the dataset in accordance with the mathematical formula and the data values associated with the first and second fields in the dataset; and rendering at least one graphical representation of the one or more statistical models on top of the graphical visualization of the relationship between the first field and the second field of the dataset in the graphical view of the dataset.