Question

Is the following relation a function?

Picture posted below.

Best answer gets fan + medal.

Answer 1

it is not a function, because for every imput you need to get a unique output.

Answer 2

where if you graphed this, a good test of a function is if its passes the vertical line test, which means that it wont hit the function of the line more than once for each vertical line

Answer 3

because of the fact that when x=6 and 4 you get the same output

Answer 4

Great, Thanks Xo.