Based on the following scatter plot, which of the time- series components is not present in this quarterly time series? 
Definitions:
Cost of Equity
The return a firm theoretically pays to its equity investors to compensate them for the risk they undertake by investing in the company.
Total Debt
The sum of all short-term and long-term liabilities owed by an entity.
Weighted Average
A calculation that takes into account the varying degrees of importance of the numbers in a data set.
Cost of Capital
The rate of return that a company must earn on its projects to maintain its market value and attract investment.
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