To find the degree of the polynomial function \( f(x) = 7x(x-2)^2(x+4)^3 \), we need to determine the degree of each factor and then sum these degrees.
- The term \( 7x \) has a degree of 1.
- The term \( (x-2)^2 \) has a degree of 2.
- The term \( (x+4)^3 \) has a degree of 3.
Now, we add these degrees together:
\[ \text{Degree of } f(x) = 1 + 2 + 3 = 6 \]
Thus, the degree of the polynomial \( f(x) \) is \( 6 \).
The correct response is 6.