alexie78 alexie78

28-10-2020
Mathematics

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aily0512 aily0512

28-10-2020

Answer:

The first and 3rd are functions, but the second and fourth are not functions.

Step-by-step explanation:

To see if something is a function, use the vertical line test. If there are multiple y coordinates for a singular point for x, it is not a function.

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