Answer:
The correct answer is C.
Explanation:
To find f(-2), you need to substitute -2 for x in the function f(x) = 9 + 3x and evaluate it:
f(-2) = 9 + 3*(-2)
Now, perform the calculations:
f(-2) = 9 - 6
f(-2) = 3
So, f(-2) = 3.
The correct answer is C.