The function illustrates that the bill for someone who uses 600 kilowatt will be $80.
It should be noted that a function simply means an expression that defines the relationship between a variable and another variable. In this case, one can infer that functions are essential in the formulation of relationship between the variables that are given.
Based on the information given, it should be noted that it was stated that the power company calculates a person's monthly bill from the number of kilowatt-hours.
The bill for someone who uses 600 kilowatt will be:
= 0.1(x - 400) + 60
= 0.1(600 - 400) + 60
= 0.1(200) + 60
= 20 + 60
= 80
In conclusion, the bill will be $80.
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