[tex]f(x) = \frac{1}{9} x - 2 \\ [/tex]
[tex]f( - 1) = \frac{1}{9} ( - 1) - 2 \\ [/tex]
[tex]f( - 1) = - \frac{1}{9} - 2 \\ [/tex]
[tex]f( - 1) = - \frac{1}{9} - \frac{18}{9} \\ [/tex]
[tex]f( - 1) = - \frac{19}{9} \\ [/tex]
