About $43,000 because if you look on the graph, look for 2018 and go up until you meet the line. Then, using that, you can move left to the sales indication. The line hits 2018 between 40,000 and 45,000, so it is $43,000.
According to the graph we can see that the green diagonal line is the projected average in sales. This Average is based on all the sales that each year has had. That being said if we go to were 2018 meets the green line we can see that it is between 40-45 if we look to the left. This means that the projected sales in 2018 is between 40,000 and 45,000. Therefore the best estimate would be 42,500 in sales for 2018.
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