# Real-Life Application of Functions Versus Relations and Reversal of Variables

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In the real world, what might be a situation where it is preferable for the data to form a relation but not a function?

If the variables in an equation were reversed, what would happen to the graph of the equation? For example, how would the graph of y = xÂ² relate to the graph of x = yÂ²?

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#### Solution Preview

The graph of y=x^2 and x=y^2 are symmetric with respect to the line y=x.

In real ...

#### Solution Summary

An application of a function versus a relation is provided. The effect of reversal of variables is investigated.

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