To determine which house had the lowest cost per day, we can analyze the provided data.
House 1: From the table, we can calculate the cost per day for House 1.
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For 6 days, the cost is $97.50:
Cost per day = $97.50 / 6 days = $16.25 per day -
For 8 days, the cost is $130.00:
Cost per day = $130.00 / 8 days = $16.25 per day -
For 12 days, the cost is $195.00:
Cost per day = $195.00 / 12 days = $16.25 per day
The cost per day for House 1 is consistently $16.25.
House 2:
To find the cost per day corresponding to the graph for House 2, we can observe the points on the graph. The y-coordinate gives us the total cost, and the x-coordinate gives the number of days.
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For 10 days, the cost is $150:
Cost per day = $150 / 10 days = $15.00 per day -
For 15 days, the cost is $225:
Cost per day = $225 / 15 days = $15.00 per day -
For 20 days, the cost is $300:
Cost per day = $300 / 20 days = $15.00 per day
The cost per day for House 2 is consistently $15.00.
Comparison:
- House 1: $16.25 per day
- House 2: $15.00 per day
Since $15.00 (House 2) is less than $16.25 (House 1), House 2 had the lowest accumulated electricity cost per day.
So, the answer is: House 2 had the lowest accumulated electricity cost per day.