Question 1195917
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Answer: No, it is not a function.


Reason: 
The input x = 4 leads to multiple outputs (y = 8 and y = 6) at the same time. This is due to the points (4,8) and (4,6)
For a function to be possible, any input must lead to exactly one and only one output. 


A quick way to check if we have a function or not is to see if x repeats itself. 
If x repeats itself, then we don't have a function. 
The y values can repeat, but the function won't be one-to-one.
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