Based on the information give your forecast for period 7 is 40.
Given:
Time-series trend equation=25.3+2.1x
Period=7
Let x present period 7
Hence:
Forecast for period 7 =25.3 +2.1(7)
Forecast for period 7 =25.3 +14.7
Forecast for period 7 =40
Inconclusion your forecast for period 7 is 40.
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