Respuesta :

Answer:

d

Step-by-step explanation:

Answer:

b.  -1

Step-by-step explanation:

To find f(-1), you need to plug -1 wherever there is an x in f(x).

f(x) = 2x + 1

f(-1) = 2(-1) + 1

f(-1) = -2 + 1

f(-1) = -1