Question

Given the following piecewise function, evaluate f(-1).f(x) =3x +4. X < -1-8x +8 x> -1

Answer 1

We have the expression:

$3x+4\text{ if x}\leq-1$

So, when x=-1 we need to use this expression, so lets plot -1 on it:

$3(-1)+4=-3+4=1$

so f(-1)=1.