Question

f(x) = 3x + 2; f(-1)

Answer 1

the function is:

$f(x)=3x+2$

so f(-1) is evaluate he function in -1 or replace x=-1 so:

$\begin{gathered} f(-1)=3(-1)+2 \\ f(-1)=-3+2 \\ f(-1)=-1 \end{gathered}$