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Mathematics 18 Online
harperlynn:

which of these graphs shows a function

harperlynn:

1 attachment
Pixel:

a function uses the equation f(x)= x + y

justjm:

Use the vertical line test. Draw an arbitrary line x=n and ensure the relation intersects the arbitrary line only once. If it intersects more than once, the relation is not a function. If it never intersects, then the relation is horizontally bounded by x=n.

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