\[x_{0} = - \frac{1}{2};\ \ \ y_{0} = 6\frac{1}{4}\]
\[y( - 2) = 4;\ \ \]
\[y(3) = - 6\]
\[E(y) = \left\lbrack - 6;6\frac{1}{4} \right\rbrack.\]