Functions are one of the most important and powerful tools in mathematics because they allow the symbolic, visual, and verbal representation of relationships between variables. The power of functions, as well as the numerous real-world uses of functions, make them an important part of the development of algebraic reasoning in the middle grades. This article describes an investigation that allowed middle-grades students to work with various representations of functions including graphs, tables, and verbal descriptions, within a rich context. Adapted from Van de Walle, Karp, and Bay-Williams (2010), the investigation engaged students in thinking about the relationship between the volume of water poured into a vase and the height of the water in the vase. This investigation helped students see how each representation they created illustrated the functional relationship between the variables involved and how each representation provided a different view of this relationship. (Contains 3 figures.)