Question

What is the parent graph of a square root function?

Answer 1

`y=x^2` with explicit domain `[0, oo)`

Explanation:

You could use `y = x^2` with explicit domain `[0, oo)` as the parent graph:

graph{(sqrt(x)/sqrt(x))x^2 [-4.767, 5.23, -0.6, 4.4]}

Reflecting this in the diagonal line `y=x` we get the graph of `y = sqrt(x)`:

graph{sqrt(x) [-4.767, 5.23, -0.6, 4.4]}