The notation "x₁, x₂, ..., xₙ" represents a sequence of variables or elements in mathematics and statistics. Each "x" followed by a subscript indicates a specific element in the sequence, where "n" denotes the total number of elements. This notation is commonly used in various fields, including algebra, calculus, and data analysis. In a practical context, these variables can represent data points, measurements, or values in a dataset. For example, in a dataset of heights of individuals, "x₁" could represent the height of the first person, "x₂" the second, and so on, up to "xₙ," the height of the nth person.