Give the approximate domain and range of each function....

Key Concepts

Range

The range of a function is the set of all possible output values (often represented by y-values) that the function can produce when it is defined on its domain. In a graph, the range is identified by looking at the overall vertical extent of the graph, from its lowest point to its highest point, and it reflects the behavior of the function’s outputs.

Graph Interpretation

Graph interpretation involves reading and understanding the key features of a function’s graph, such as intercepts, endpoints, turning points, and asymptotes. This process is essential when determining the approximate domain and range of a function, as one must visually assess which x-values are covered by the graph and what values the corresponding y-values attain.

Function

A function is a mathematical relation that uniquely associates each element of a set, known as its domain, with exactly one element of another set, known as its range. Understanding this idea is crucial because it underpins how we interpret any visual representation of the function, and it is the foundation upon which concepts like domain and range are defined.

Domain

The domain of a function is the complete set of all possible input values (often represented by x-values) for which the function is defined. When analyzing the graph of a function, the domain is determined by identifying all x-values over which the graph extends, and it may be subject to restrictions based on the nature of the function (such as division by zero or square roots of negative numbers).

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