Determine the domain, range and if a relation is a function

The video tutorial explains how to find the domain and range of a relation and determine if it is a function. It introduces the concept of mapping as a way to represent relations between inputs and outputs. The tutorial emphasizes that for a relation to be a function, each element in the domain must map to exactly one element in the range. Examples are provided using teachers and subjects to illustrate these concepts. The video concludes by reinforcing the definition of a function and clarifying that multiple domain elements can map to the same range element, as long as each domain element maps to only one range element.

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