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It would be 4" my good friend
Answer:
A function can only have one y value for each value of x, ie., y = f(x). The vertical line test verifies this. If you move a vertical line across the grid, your graph should never intersect this line at more than one place at a time. If it intersects at 2 or more places, there is no way a y=f(x) can make this happen, so then it is not a function.
I would go with 12.0 kg because if you add the amount of food she ate and water she drank it would equal to 3 kg so you, get 3 kg and multiply it by 4 days and you get 12 kg
Hope this helps :)
