ANSWER
(-2,4] and [7,∞).
EXPLANATION
The domain refers to the interval on which the function is defined.
In the case of the graph, the domain refers to all the x-values for which the graph exists.
The graph is defined for x-values greater than 2 but less than or equal to 4 and
x-values greater than or equal to 7.
In interval notation, we have:
(-2,4] and [7,∞).
The second choice is correct: