Answer:
C. The growth factor of g is twice the growth factor of f.
Explanation:
Let's find the growth factor of g(x) by getting its equation. To do it, we are using the standard exponential equation:

where
is the initial value
is the growth factor
We know form our graph that g(x) passes throughout (0, 3), so
and
.
Replacing values



We also know from our graph the g(x) passes throughout (1, 12), so
and
.
Replacing values







The growth factor of g(x) is 4.
Now, to find the growth factor of f(x), we just need to equate 1+b with
and solve for b:




Finally, we can divide the growth factor of g(x) by the growth factor of f(x) to find how many times bigger is the growth factor of g(x):

We can conclude that the growth factor of g is twice the growth factor of f.