NEED HELP QUICK!
1. Mario measured the depth of the river as a function of time and graphed his findings. Use this graph to answer the following question.
What is/are the interval(s) where the graph is increasing?
A. (2, 10)
B. (2, 4) U (4, 10)
C. (9, 22)
D. (0, 3) U (7, 9)