Question

If f(x) {x + 5 }. And f(-4). Why is the answer 9?

Answer 1

According to the piecewise function, when x is less than -2, the function is x+5.

In this case -4 is less than -2, which means that the function is:

$\begin{gathered} f(-4)=-4+5 \\ f(-4)=1 \end{gathered}$