Sagot :
Answer:
Every function is a relation, but not every relation is a function.
A function is a well-defined relation.
By well-defined we mean the elements are mapped to a unique and a specific image correspondingly.
So, the mathematician will be able to study and use all the tools possible to understand and visualize the map.
An example of a relation that is not a function is the Circle.
They usually use a vertical line to test if the graph or relation has more than one image at a specific point.
At x=2, we have two images which contradicts the original concept of a function.
Step-by-step explanation:
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![View image JoshIsAProB](https://ph-static.z-dn.net/files/d28/9c62e9a19194b8086277523931170e7d.jpg)
![View image JoshIsAProB](https://ph-static.z-dn.net/files/d64/2416714b78ba34b24b20a35cbf1e5830.jpg)
Answer: