Goal To use equations of lines in a real-world application Role You work in the marketing department of a tele-communications company. Audience The director of marketing Situation You are trying to convince the director of marketing to get involved in the cell phone industry Task Mobile phone usage has been steadily increasing. The data below shows the mobile phone usage (in millions) base on years . 1994 - 37 5 million users 1998 - 70 million users . 2002 - 102.5 million users Performance Task: You are to write a report to the director of marketing that discusses your predications for mobile phone usage and why you believe that it would be good for your company to get involved in the mobile phone industry. Include the following in your report . The equation of the line of best fit based on the above data . An interpretation of the value of the slope and the y-intercept . The reliability of your model . A prediction for the amount of mobile phone usage two years from today