Ответ:
\[y = 0,5x^{2}\]
| \[x\] | \[0\] | \[1\] | \[2\] | \[- 1\] | \[- 2\] |
|---|---|---|---|---|---|
| \[y\] | \[0\] | \[0,5\] | \[2\] | \[0,5\] | \[2\] |

\[y = 0,5x²;\ \ y = 2\]
\[0,5x² = 2\ \ \ \ \ |\ :0,5\]
\[x^{2} = 4\]
\[x = \pm 2.\]
\[y = 0,5x^{2}\]
| \[x\] | \[0\] | \[1\] | \[2\] | \[- 1\] | \[- 2\] |
|---|---|---|---|---|---|
| \[y\] | \[0\] | \[0,5\] | \[2\] | \[0,5\] | \[2\] |

\[y = 0,5x²;\ \ y = 2\]
\[0,5x² = 2\ \ \ \ \ |\ :0,5\]
\[x^{2} = 4\]
\[x = \pm 2.\]