Question 1191116
the function would be y = .20 + .15 * x


the value of x is determined by the duration of the call.


if the call lasts less than or equal to 1 minute, then x = 1 and the formula becomes y = .20 + .15 * 1 = .35


if the call lasts more than 1 minute and less than or equal to 2 minutes, then x = 2 and y = .20 + .15 * 2 = .50


if the call lasts more than 2 minutes and less than or equal to 3 minutes, then x = 3 and y = .20 + .15 * 3 = .65


if the call lasts more than 3 minutes and less than or equal to 4 minutes, then x = 4 and y = .20 + .15 * 4 = .80.


if the call lasts more than 4 minutes but less than or equal to 5 minutes, than x = 5 and y = .35 + .15 * 4.= = .95


the function can be graphed.


it looks like this.


<img src = "http://theo.x10hosting.com/2022/022001.jpg" >