Each week 5 new office phones are installed in a major network company. At the beginning of March, 200 phones had already been installed. Write a linear equation (in the slope-intercept form) to model this situation. Do not use spaces in the equation. Let x represent the number of weeks after the beginning of March. Use your equation in slope-intercept form to answer the following question: If the company wanted to replace all of the phones in the building (500 total), how many weeks would it take to finish this project? weeks