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In simple terms, if a vertical line meets a graph in more than one place it is not a function.

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Q: When do you say that a graph is a function?
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Related questions

When do you say that graph is function?

A graph is a function if any vertical line intersects it at most once.


When can you say that the graph is function or mere relation?

If a vertical line intersects the graph at more than one point then it is not a function.


When the points on a graph tend to go downward from left to right you say they indicate what?

They mean the graph/function is decreasing.


Is a circle graph a function?

No, a circle graph is never a function.


What is the zero of a function and how does it relate to the functions graph?

A zero of a function is a point at which the value of the function is zero. If you graph the function, it is a point at which the graph touches the x-axis.


How can you tell if a graph is a sine function or a cosine function?

sine graph will be formed at origine of graph and cosine graph is find on y-axise


Can a line be a graph of a function?

Yes the graph of a function can be a vertical or a horizontal line


Can a line be the graph of a function?

Yes the graph of a function can be a vertical or a horizontal line


How is the function differentiable in graph?

If the graph of the function is a continuous line then the function is differentiable. Also if the graph suddenly make a deviation at any point then the function is not differentiable at that point . The slope of a tangent at any point of the graph gives the derivative of the function at that point.


How can you tell if a graph sHow is a function?

Test it by the vertical line test. That is, if a vertical line passes through the two points of the graph, this graph is not the graph of a function.


Is the first derivative of a function is a constant then its graph is?

A line. The derivative of a function is its slope. If the slope is a constant then the graph is a line.


How does the graph of the Mandelbrot set function relate to composite functions?

The Mandelbrot graph is generated iteratively and so is a function of a function of a function ... and in that sense it is a composite function.