Answer: A
Explanation:
The domain of a function is the minimum and maximum value of independent variable (x).
The domain of the function according to the given graph will be the starting point of the line of best fit to the end point of the line.
Trace the starting point and the end point to the x - axis.
If you do so, the starting point is 2 and the end point is 10.
The domain is therefore, 2< = x <= 10. The correct answer is A