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Word problem on linear equations

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The credit remaining on a phone card is a linear function of the total calling time. The function gives a line with a slope of -.32, when graphed. There is $62.05 in credit remaining after 70 minutes of calls. What is the credit outstanding after 53 minutes?

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The credit remaining on a phone card is a linear function of the total calling time. The function gives a line with a slope of -.32, when graphed. There is $62.05 ...

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Sandhya Sharma, MSc
Education
  • BSc, Meerut University
  • MSc, Meerut University
  • MPhil, Institute of Advanced Studies
  • MSc, AIT
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