Answer:
Yes, it is a function
Explanation:
Hello!
A domain is the set of x-values in a function. Each x-value can only have one unique output.
For example, 4 can only output 5, but if it gives multiple outputs, then it is not a function.
This is because each function is an equation. For example, say the equation is y = x + 1. Plugging in 4 can only give you 5. If it gives two outputs, it's not a function.
That said, different inputs can have the same output, in the case of an exponential equation.
Looking at these numbers, each input seems to have a unique output, so, therefore, it is a function.