The cost of a telephone call made through a leased line


Question: The cost of a telephone call made through a leased line service is 2.5 cents per minute.

a. Write down the linear equation that relates the cost y (in cents) of a call to its length x.

b. Calculate the cost of a call that lasts 23 minutes.

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Basic Statistics: The cost of a telephone call made through a leased line
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