SOLUTION: The credit remaining on a phone card (in dollars) is a linear function of the total calling time made with the card (in minutes). The remaining credit after 30 minutes of calls is
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Question 1147333: The credit remaining on a phone card (in dollars) is a linear function of the total calling time made with the card (in minutes). The remaining credit after 30 minutes of calls is $16.10, and the remaining credit after 59 minutes of calls is $12.33. What is the remaining credit after 79 minutes of calls?
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
points (30, 16.1) & (59, 12.33)
Simplify the formula.
Let x be 79 and evaluate y to answer the question.
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