Answer: Yes, it does, because each input value has an unique output value.
Explanation:
First, you need to know when a relation is considered a function.
By definition, a relation is a function if an only if each input value has one and only one output value.
It is important to remember that the input values are the values of "x" and the output values are the values of "y".
Then, in this case, you can observe in the graph attached ( which shows the data for Camille’s puppy), that each x-value (Weeks) has an unique y-value (Weight in pounds).
Therefore, based on this and keeping on mind the explained before, you can conclude that the data for Camille’s puppy shows a function.