Chapter 1 - Whole Numbers - 1.9 Reading Pictographs, Bar Graphs and Line Graphs - 1.9 Exercises - Page 86: 1

The number of pictures or symbols for the Walgreens retail stores is 8. Since each symbol represents 500 stores, Walgreens has 8 * 500 = 4000 stores.

Each symbol represents 500 stores, so to determine the number of stores that Walgreens has, we count the number of symbols it has and multiply that number by 500. 8 * 500 = 4000.