v1 Algebra, STD2 A4 2023 HSC 21

Electricity provider charges 30 cents per kilowatt hour (kWh) for electricity, plus a fixed monthly charge of $90.

1. Complete the table showing Provider 's monthly charges for different levels of electricity usage.   (1 mark)
   
   
   

 

2. On the grid above, graph Provider 's charges from the table in part (a).   (1 mark)
3. Use the two graphs to determine the number of kilowatt hours per month for which Provider and Provider charge the same amount.   (1 mark)
   

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4. A customer uses an average of 600 kWh per month.
5. Which provider, or , would be the cheaper option and by how much?   (2 marks)
   

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