Electricity wasn't the only energy cost. also look at logs for fire. being that they were bought for fire it is using heat energy. there for making the total energy cost the highest. only look at what is energy cost toward the overall bill.
Answer:
The derivative is

Step-by-step explanation:
The function is given by

Differentiate with respect to x, we get

Answer:
- 1
Step-by-step explanation:

= 
= - 1
Answer: y = 2x + 5
Step-by-step explanation: