The best response for Ramona's situation is:
Ramona needs to add another column to the table and find the growth factors between the consecutive values of f(x). She will be able to prove that exponential functions grow by equal factors over equal intervals.
This is because exponential functions are characterized by their growth in terms of a constant ratio (or growth factor) over equal intervals, rather than a constant difference. By determining these factors, Ramona can effectively demonstrate the nature of exponential growth.