A relation is just a set of ordered pairs. They are in no special order. Therefore there is no particular shape assigned to a relation. A function is a special kind of relation. A relation becomes a function when the x value only has one y value.
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In mathematics the difference between a function and a relation is that each X-value in a function only has a single Y-value.
Yes. All functions are relations, but not all relations are functions. Functions have to have only one y-value per x-value.
The same as in any other math class. All functions are relations but all relations are not functions. A function must have only one 'answer' in the range for each value of the domain. Relations are just pairing of numbers with no such restriction on the range.
Functions are special types of relations.
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