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The $x-$intercept of the square root equation is the value that makes the function equal to zero. Let's find this value for the given equation. To do this we will set the function rule to $0$ and solve.
We got that the $x-$intercept of this equation is at $x=-2.$ Now, let's look at the given graph.

Here the $x-$intercept occurs at $x=-3,$ so this graph **does not** represent the given equation. Therefore, Ron-Jon is **not** correct, and Maria-Jon is correct.