The correct answer is: A. not shown on timeline.
The periodic rate is the interest rate that is applied to a loan or investment each period. It is not shown on a timeline because it is a constant value that does not change over time. The only thing that changes on a timeline is the amount of money, which increases or decreases depending on the interest rate and the number of periods.
Option B is incorrect because the periodic rate is not shown on a timeline. Option C is incorrect because the periodic rate is not multiplied on a timeline. Option D is incorrect because the periodic rate is not divided on a timeline.