Pls help simple math

Answer:
[tex]y = \frac{-2}{3}[/tex]
Step-by-step explanation:
[tex]f(x)=-1[/tex], means thsat you replace all the x with -1. Then after you replace it you simplify the fraction.
[tex]f(x)=-1[/tex]
Equation: [tex]f(x) = \frac{x-1}{3}[/tex]
Steps:
1. [tex]f(-1)= \frac{(-1)-1}{3}[/tex]
2. [tex]f(-1)= \frac{-2}{3}[/tex]
Answer:
[tex]f(-1)= \frac{-2}{3}[/tex]