Answer:
B. (0, 4)
Step-by-step explanation:
A function is "increasing" where its slope is positive (up to the right). Here, the graph has positive slope between x=0 and x=4.
The slope is 0 from x=4 to x=7, and the function is decreasing (has negative slope) for x=7 to x=10.
The interval where f(x) is increasing is (0, 4).
