The correct answer would be to - Cite a source
        
             
        
        
        
Answer:
adjusted exponential smoothing; linear regression. 
Explanation:
A time series can be defined as a technique used in statistical analysis and it involves indexing sets of data elements in a timely or successive order i.e sequentially. 
Two time series techniques that are appropriate when the data display a strong upward or downward trend are adjusted exponential smoothing and linear regression.
An adjusted exponential smoothing is a statistical technique used for forecasting through the calculation of the weighted average of an actual value. 
 
        
             
        
        
        
Answer:
periodical databases 
Explanation:
Among the various databases you can now access in a library, the periodical databases contains the text and other information about articles published in magazines, journal and newspapers.
This database allows you for example to easily search for all articles written about a specific event or person, and it will return you the list of articles you can then read from a single spot, no matter where or when the article was written.
 
        
             
        
        
        
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