Chapter 10 - Statistics - 10.2 Bar Graphs and Line Graphs - 10.2 Exercises - Page 722: 29

150,000

We are asked about Store A, so we only look at the blue line. We first find the the year 2015 on the x-axis. Going up vertically, we find the corresponding data point. Once we reach this data point, we move horizontally and to the left to find the corresponding value on the y-axis. Doing this, we see that 150,000 wireless headphones were sold.