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 43 minutes of calls is $24.41, and the remaining credit after 57 minutes of calls is $22.59. What is the remaining credit after 70 minutes of calls?
Remaining
credit
in dollars)
sc
Х
?
Calling time
(in minutes)
Explanation
Check
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