What is a “Trend Line” in sales forecasting by Time Series Analysis?
In a company the sales figures for a particular product for 16 consecutive quarters were recorded as follows:
|
Quarter
|
Units solid
|
|
1
|
1000
|
|
2
|
3000
|
|
3
|
4000
|
|
4
|
2000
|
|
5
|
1000
|
|
6
|
3000
|
|
7
|
5000
|
|
8
|
3000
|
|
9
|
2000
|
|
10
|
4000
|
|
11
|
6000
|
|
12
|
3000
|
|
13
|
2000
|
|
14
|
5000
|
|
15
|
7000
|
|
16
|
4000
|
Determine the trend line for this product.