Answer:
The demand forecast for winter is 96.36 millions KWH
The demand forecast for spring is 145.08 millions KWH
The demand forecast for summer is 169.89 millions KWH
The demand forecast for fall is 73.08 millions KWH
Explanation:
Given that,
The demand trend line is
![D=(75.0+0.45Q)\times multiplicative\ seasonal\ factors](https://tex.z-dn.net/?f=D%3D%2875.0%2B0.45Q%29%5Ctimes%20multiplicative%5C%20seasonal%5C%20factors)
We need to calculate the demand forecast for winter
Using given formula
![D=(75.0+0.45Q)\times multiplicative\ seasonal\ factors](https://tex.z-dn.net/?f=D%3D%2875.0%2B0.45Q%29%5Ctimes%20multiplicative%5C%20seasonal%5C%20factors)
Put the value into the formula
![D=(75.0+0.45\times101)\times0.80](https://tex.z-dn.net/?f=D%3D%2875.0%2B0.45%5Ctimes101%29%5Ctimes0.80)
![D=96.36\ millions\ KWH](https://tex.z-dn.net/?f=D%3D96.36%5C%20millions%5C%20KWH)
We need to calculate the demand forecast for spring
Using given formula
![D=(75.0+0.45Q)\times multiplicative\ seasonal\ factors](https://tex.z-dn.net/?f=D%3D%2875.0%2B0.45Q%29%5Ctimes%20multiplicative%5C%20seasonal%5C%20factors)
Put the value into the formula
![D=(75.0+0.45\times102)\times1.20](https://tex.z-dn.net/?f=D%3D%2875.0%2B0.45%5Ctimes102%29%5Ctimes1.20)
![D=145.08\ millions\ KWH](https://tex.z-dn.net/?f=D%3D145.08%5C%20millions%5C%20KWH)
We need to calculate the demand forecast for summer
Using given formula
![D=(75.0+0.45Q)\times multiplicative\ seasonal\ factors](https://tex.z-dn.net/?f=D%3D%2875.0%2B0.45Q%29%5Ctimes%20multiplicative%5C%20seasonal%5C%20factors)
Put the value into the formula
![D=(75.0+0.45\times103)\times1.40](https://tex.z-dn.net/?f=D%3D%2875.0%2B0.45%5Ctimes103%29%5Ctimes1.40)
![D=169.89\ millions KWH](https://tex.z-dn.net/?f=D%3D169.89%5C%20millions%20KWH)
We need to calculate the demand forecast for fall
Using given formula
![D=(75.0+0.45Q)\times multiplicative\ seasonal\ factors](https://tex.z-dn.net/?f=D%3D%2875.0%2B0.45Q%29%5Ctimes%20multiplicative%5C%20seasonal%5C%20factors)
Put the value into the formula
![D=(75.0+0.45\times104)\times0.60](https://tex.z-dn.net/?f=D%3D%2875.0%2B0.45%5Ctimes104%29%5Ctimes0.60)
![D=73.08\ millions KWH](https://tex.z-dn.net/?f=D%3D73.08%5C%20millions%20KWH)
Hence, The demand forecast for winter is 96.36 millions KWH
The demand forecast for spring is 145.08 millions KWH
The demand forecast for summer is 169.89 millions KWH
The demand forecast for fall is 73.08 millions KWH