3. Two functions are shown in the table.
X
0
1
2
4
h(x)
11
14
17
20
23
k(x)
7
14
28
56
112
Part A: Which function represents an
exponential function? Explain.
Part B: What is the average rate of
change for the function h(x) over the
interval [1, 3]? Show your work.