Period Date Practice Q)Go Online You can complete your homework online. Example 1 1. SOCCER The table shows the number of goals a soccer team scored each season since 2010, Let x be the number of years since 2010. Year 2010 2011 2012 2013 2014 2015 Goals Scored 48 52 50 42 a. Write the equation for the best-fit line for the data. b. Find and interpret the correlation coefficient. 2. REVENUE The table shows the estimated revenue earned for ringtone and ringback purchases, in millions of dollars, each year since 2010. Year 2010 2011 2012 2013 2014 2015 2016 Revenue ($) 448 276.2 166.9 97.9 66.3 54.5 40.1 a. Write the equation for the best-fit line for the data. b. Find and interpret the correlation coefficient. 3. SALES The table shows the sales of a health and beauty supply company, in millions of dollars, for several years. Let x be the number of years since 2010. Year 2011 2012 2013 2014 2015 Sales 12.2 191 29.4 37.3 45.7 a. Write the equation for the best-fit line for the data. b. Find and interpret the correlation coefficient. Example 2 4. /PURCHASING A supermarket chain closely monitors how many bottles of sunscreen it sells each year so that it can reasonably predict how many bottles to stock in the following year. Let x be the number of years since 2010. Year 2013 2014 2015 2016 2017 Bottles of Sunscreen 60,200 65,000 66,300 65,200 70,600 a. Find the equation for the best-fit line for the data. b. How many bottles of sunscreen should the supermarket expect to sell in 2025? Lesson 5-5 . Linear Regression 3