Item 17 A certain cell phone plan charges a fee of $1 for each international call made plus $0.02 for each second of talk time for the international call. A business owner tracked the time and cost for each of the calls made by the employees when they traveled internationally for business. What is the appropriate value of the correlation between time and cost for the international calls?

Answer and Explanation:

The appropriate value is 1.02 because each call takes at least one second

c = 1 + 0.02 (t)

Explanation:

The cell phone plan charges a fee of $1 for each international call made and another $0.02 for each second of talk time for the international call. The appropriate value of correlation and tie can be computed as follows:

let

t = time spent on international call (seconds)

c = cost of the international call

Making an international call attract a non negotiable fee of $1. Therefore the cost with respect to time in seconds can be expressed as follows

c = 1 + 0.02 (t)

The time spent is measured in seconds. Example if one of his employee makes a 60 seconds call the cost will be

c = 1 + 0.02 (t)

c = 1 + 0.02 (60)

c = 1 + 1.2

c = $2.2