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Determine which relation is a function.
http://prntscr.com/9f197y <--- A & B
http://prntscr.com/9f1a7h <--- C & D
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Is it B?
When we have two variables x and y, and we name them in such a way that one can have any arbitrary value while the other is solvable for, we call this relationship "functional relation between variables".
This of course is notated as
Meaning, "y" is a variable that depends on "x" and you know it better as f(x).
Now, \(\phi (x)\) is often represented by a mathematical expression which determines the pattern of the functionality of the variable "y".
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Maybe... Why do you think it's "B"?
because, it passes through the line(the function). http://prntscr.com/9f1hym
Wat do you mean it "passes through the line".?
The circle cuts the x-axis as well, but it is not a function.
There is something very important, traditional functions whose variable depends on the other have that is important.
Im so confused. >.> sorry
B is correct.
not because it intersects the axis, but because every x in the domain has one and only one value of "y", that is a definition for "function".