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Answer:
1: Is a function
2: Isnt a function
3: Is a function
4: Isnt a function
Reminder: Functions CAN"T have the same x values but different y values!!!!
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Answer:
Sorry, all I know is the first one is a function.
Step-by-step explanation:
It's linear, and passing the vertical line test because it only has a point on each part of the x-axis, if you were to graph it.