The curve $y=f(x)$ is such that its slope is equal to $y^{2}$ for all real $x$. If the curve passes through $(1,-1),$ the value of $y$ at $x=-2$ is ___________(round off to 1 decimal place).

The curve $y=f(x)$ is such that its slope is equal to $y^{2}$ for all real $x$. If the curve passes through $(1,-1),$ the value of $y$ at $x=-2$ is ___________(round off to 1 decimal place).

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