\[y = x + 1\]
\[x = 1 \Longrightarrow y = 1 + 2 = 2.\]
\[x = - 1 \Longrightarrow y = - 1 + 1 = 0.\]
\[x = 0 \Longrightarrow y = 0 + 1 = 1.\]
\[x = 2 \Longrightarrow y = 2 + 1 = 3.\]