Question

Is `sqrt(x+5)` a function?

Answer 1

Yes

Explanation:

`f(x) = sqrt(x+5)`

This is the square root function moved -5 units horizontally. It passes the "vertical line test" i.e. there is only one unique output in the range for each domain input so it is a function.

graph{sqrt(x+5) [-10, 10, -5, 5]}