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31 August, 21:46

How to tell whether or not that something is a function on a graph?

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  1. 31 August, 22:13
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    To use the vertical line test, take a ruler or other straight edge and draw a line parallel to the y-axis for any chosen value of x. If the vertical line you drew intersects the graph more than once for any value of x then the graph is not the graph of a function.
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