Answer
$$ y =x^{3/2}+1$$
Work Step by Step
Given $$ x=t^2,\ \ \ \ y= t^3+1$$
Since $ t=\sqrt{x}$, then
\begin{align*}
y&= t^3+1\\
&= x^{3/2}+1
\end{align*}
i.e.
$$ y =x^{3/2}+1$$
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