Find the average rate of change of the number of digital cameras sold from 2006 to 2015

5900 units per year  

Step-by-step explanation:

The average rate of change  from (x₁, y₁) to (x₂, y₂) is the slope of the straight line joining the two points.

slope = (y₂ - y₁)/(x₂ - x₁)

From the graph, I estimate your points to be (2006, 35 000) and (2015, 88 000).  

slope = (88 000 - 35 000)/(2015 - 2006) = 53 000/9 ≈ 5900 units per year

The  average rate of change in the number of digital cameras sold between 2006 and 2015 was 5900 units per year.  

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step-by-step explanation: