# How do you evaluate the function y=x-9 for these values of x: -2, -1, 0 and 1?

There's no great feat, we have $f \left(x\right) = x - 9$ so $f \left(- 2\right) = - 2 - 9 = - 11$ , $f \left(- 1\right) = - 1 - 9 = - 10$, $f \left(0\right) = 0 - 9 = - 9$, and $f \left(1\right) = 1 - 9 = - 8$.