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Is this graph a function or not a function

Is this graph a function or not a function-example-1
User Andreisrob
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2 Answers

6 votes

Answer:

No

Explanation:

Do a vertical line test.

First, put your pencil or ruler up against the screen.

Move it down the graph and if there are two points in one x point, it is not a function. For example, look at 0, 3 and 0, -2.5. They share the same x point.

Therefore, it is not a function.

User Lubo
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7.9k points
3 votes

Answer:

In the graph of a circle, we can easily draw a straight vertical line passing through its center. This will hit the top and the bottom of the shape. Since this line hits two points, a circle's graph is not a function. We can also observe the equation of a circle.

User Tosha
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7.8k points

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