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The relationship between the monthly fee that the cable company charges for internet service and the fee for downloading over 32KB of information is modeled by the linear function f (x) = 1.25x + 45, where x is the number of KB over 32. If the total bill for a month is $170, how many KB was in excess of 32 KB that month?

User Lorilynn
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2 Answers

7 votes
1.25x = 170-45
1.25x = 125
x = 100
User Mdnghtblue
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7.3k points
2 votes
100 Kilobytes.
Because if the total is 170, then
1.25x = 170-45
1.25x = 125
x = 100
User Hanniel
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8.1k points