SOLUTION: The monthly cost (in dollars) of water use (in dollars) is a linear function of the amount of water used (in hundreds of cubic feet, HCF). The cost for using 17 HCF of water is $34
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-> SOLUTION: The monthly cost (in dollars) of water use (in dollars) is a linear function of the amount of water used (in hundreds of cubic feet, HCF). The cost for using 17 HCF of water is $34
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Question 697428: The monthly cost (in dollars) of water use (in dollars) is a linear function of the amount of water used (in hundreds of cubic feet, HCF). The cost for using 17 HCF of water is $34.47 , and the cost for using 45 HCF is $80.67 . What is the cost for using 25 HCF of water?
You can put this solution on YOUR website! Basically, they are giving you 2 points on a graph, and
they want you to find a 3rd point.
Plot hundreds of ft3 ( HFC ) on the horizontal axis
and Monthly cost on the vertical axis.
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Given:
( 17, 34.47 ) and
( 45, 80.67 )
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Let = Monthly cost of water use
Let = HFC's of water
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Use the general point-slope formula answer
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check answer:
Does the line include ( 45, 80.67 )
OK- you can check ( 17, 34.47 )
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What is the cost for using 25 HCF of water?
The cost is $47.67
